Is buying from a private seller or dealer better?

Private sellers typically price lower and have less leverage in negotiation, but offer no warranty and less accountability. Dealers typically price higher but provide more process protection, financing options, and sometimes warranty coverage. Your preference depends on how price-sensitive you are versus how much you value process safety.

Are Facebook Marketplace cars cheaper on average?

In general, yes. Private sellers on Facebook Marketplace average 5-15% below equivalent dealer listings in most markets. The gap is largest for older, higher-mileage vehicles where private sellers discount more aggressively.

How do I know if a listing is from a curbstoner (unlicensed dealer)?

Signs: The same seller has multiple listings active simultaneously. The seller's name differs from the name on the title. The seller is vague about where they got the car. They resist showing you the title before the transaction. Curbstoners are not always illegal depending on state limits, but buying from one gives you fewer protections than a licensed dealer.

What platforms work for buying out of state?

Bring a Trailer, Carvana, and Vroom are designed for out-of-state purchases. CarGurus and AutoTrader are useful for finding inventory nationally but require you to manage the logistics. Facebook Marketplace and Craigslist are most effective for local transactions.

Where to Buy a Used Car Online: Platform-by-Platform Guide

The used car market has never been more fragmented. Listings that would have appeared exclusively in the classifieds section of a Sunday newspaper now live across a dozen platforms, each with different pricing dynamics, seller types, photo standards, and scam exposure. Knowing which platform to use for which type of purchase saves time, money, and frustration.

This guide covers every major platform: who lists there, what to expect on price, what the photos tell you (and what they hide), and where Dr.Vin fits into each.

Facebook Marketplace

Best for: Private-party deals, finding underpriced local inventory, high-volume variety

Facebook Marketplace is the largest private-party used car venue in the United States. Volume exceeds Craigslist significantly, and the integrated messaging system makes initial contact lower friction than anonymous email.

Price positioning: Below average. Private sellers on Facebook often undervalue their cars, particularly older sellers less familiar with current market pricing. This creates genuine deal opportunities but also attracts buyers who negotiate aggressively.

Photo quality: Wildly inconsistent. Some listings are professional-grade; many are five blurry phone photos taken in a dark garage. The photo inspection checklist was essentially written for Facebook Marketplace-quality photography.

Scam prevalence: High. Facebook Marketplace is the primary vector for shipping scams (fake buyer sends fake payment, asks you to ship the car or send funds for transport), fake escrow scams, and curbstoner fraud (unlicensed dealers posing as private sellers). Before you engage: verify the seller has a real profile history, insist on local in-person transactions, and never send money via Zelle, Venmo, or wire transfer before physically receiving the car.

Best practices: Filter to within 50 miles and pick up in person. Use search alerts for specific models. The search functionality is mediocre; plan to revisit daily for new listings rather than relying on alerts.

How Dr.Vin helps: Facebook listings are the highest-value use case for Dr.Vin's assessment. Sellers are rarely professional, photos are often incomplete, and there is no dealer accountability structure. Running a Dr.Vin assessment before committing to a trip surfaces issues the photos technically show but most buyers miss.

Craigslist

Best for: Buyers who know exactly what they want and can move quickly; markets where Facebook Marketplace is thinner

Craigslist has declined significantly in used car volume since Facebook Marketplace launched, but it remains viable in many markets, particularly for older vehicles, project cars, and commercial vehicles.

Price positioning: Mixed. Some listings are competitive; many are stale and overpriced. Craigslist attracts both sophisticated sellers who price carefully and optimistic sellers who have not updated their listings in months.

Photo quality: Often poor. The platform's photo upload interface has always been primitive, and many sellers treat it as such. Expect 3-8 photos, often small and compressed.

Scam prevalence: Lower than Facebook Marketplace for in-person local transactions, higher for listings that involve "I'm out of state but I can ship it." Apply the same rules: local, in-person, verified cashier's check or cash only.

Who still uses it: Mechanics, flippers, hobbyists listing project cars, and commercial sellers of work trucks and vans. If you are looking for a mid-2000s diesel truck for a work project, Craigslist may still have more of them than Facebook in your area.

CarGurus

Best for: Comparison shopping, understanding market pricing, dealer inventory research

CarGurus is the strongest of the aggregator platforms for a specific reason: its "Instant Market Value" rating tells you whether a listing is priced above, below, or at market. This context is genuinely useful when evaluating dealer listings.

Price positioning: Dealer-heavy. The vast majority of CarGurus inventory comes from dealerships, which price more consistently than private sellers but typically higher than the private market. A "Great Deal" rating on CarGurus is meaningful context but uses book value, not actual condition.

Photo quality: Better than private listings. Dealers use consistent photo templates, often including 15-20+ images. However, dealer photos are staged to maximize appeal, not to reveal issues. See the paint defect guide for what even professional dealer photos sometimes reveal.

Scam prevalence: Low for dealer listings. Private seller scams exist but are less common.

Best practices: Use the pricing transparency data. If a car is rated "High Price," there is usually a reason to keep looking or negotiate harder. Filter by distance and sort by "Best Deal" to prioritize value.

AutoTrader and Cars.com

Best for: Browsing dealer inventory, brand/model comparison

Similar positioning to CarGurus with less sophisticated pricing analytics. Both platforms are primarily dealer aggregators with some private seller listings mixed in. AutoTrader has a longer history and broader dealer relationships; Cars.com is comparable in function.

Price positioning: Market rate to slightly above. These platforms attract buyers who are early in the research process, so sellers often price for shoppers who are less price-sensitive.

Photo quality: Good for dealer listings, inconsistent for private sellers.

Scam prevalence: Low for dealer listings; verify private sellers independently.

What these platforms do well: Filtering by specific features (trim level, color, transmission, options). If you need a Toyota Camry XSE in exactly one color with the V6, AutoTrader's filtering surfaces it faster than most alternatives.

Carvana and Vroom

Best for: Buyers who want a no-haggle transaction and home delivery; trust is paramount

Online retailers handle the entire transaction: purchase, financing, delivery, and a return window (Carvana's 7-day policy is the most well-known). No negotiation, no dealer sales floor, no travel.

Price positioning: Above market. The convenience premium is real and consistent. Carvana vehicles typically price 3-8% above comparable private-party sales. The value proposition is time and process simplicity, not price.

Photo quality: High. Carvana's 360-degree photo system is the industry standard. You get far more visual information than most private listings provide.

Trust dynamics: Both companies have experienced significant business challenges in recent years. Carvana specifically has had widely publicized title and registration issues -- buyers in some cases waited months for their titles. Research current reputation before committing to an online retailer transaction. This may be resolved, but verify current reviews.

Return policy value: The 7-day return policy is the genuine differentiator. If you are buying a vehicle from across the country without an in-person inspection, this risk backstop has real value.

How Dr.Vin complements it: Even with 360-degree photos, an independent assessment before delivery confirmation is worthwhile. Use Dr.Vin's assessment on the Carvana photos. If the assessment surfaces findings that do not appear in Carvana's condition report, you have information for the return decision.

CarMax

Best for: Buyers who want the dealer experience without high-pressure sales tactics

CarMax occupies a middle position: physical locations with the no-haggle pricing of an online retailer. Their appraisal process and reconditioning standards are consistent, and the transfer-between-locations feature lets you bring a specific vehicle to a local store for inspection.

Price positioning: Above market, similar to Carvana. The no-haggle model eliminates negotiation anxiety but also eliminates the ability to find value through skilled negotiation.

Photo quality: Professional and standardized, similar to CarGurus' dealer inventory.

Inspection access: CarMax allows pre-purchase inspection by your own mechanic, which is notably more flexible than some dealers. Use this. A used car pre-purchase inspection at a CarMax purchase is entirely compatible with the buying process.

Bring a Trailer and Cars and Bids

Best for: Enthusiast vehicles, collector cars, sports cars, trucks with character

Bring a Trailer (BaT) and Cars and Bids (founded by Doug DeMuro) are auction platforms for desirable vehicles. The community and documentation standards here are significantly higher than any other platform.

Price positioning: Market-to-above for desirable vehicles. BaT especially has become a price-setter for enthusiast cars. A Mazda MX-5 in exceptional documented condition sells for more on BaT than it would on Facebook Marketplace because the buyer pool is larger and more willing to pay for quality.

Photo quality: Excellent. BaT listings typically include 60-150 photos covering every angle, the engine bay, undercarriage, interior details, VIN plates, and service records. The listing documentation standards are the best in the market.

Community due diligence: The comment sections on BaT listings function as crowd-sourced inspections. Knowledgeable community members ask pointed questions about known issues for specific models, and sellers are expected to respond honestly.

Scam prevalence: Very low. Both platforms verify sellers and have moderation. Fraud is rare; the primary risk is overpaying in auction excitement rather than being defrauded.

Best practices: Create an account and watch listings for your target vehicle before you bid. Learn the market for your specific car. Set a maximum bid before the auction ends and stick to it. Budget fees: BaT charges a buyer's fee of 4.5% (capped at $450 for vehicles under $10,000).

How Dr.Vin helps: BaT's photo documentation is extensive enough to run a thorough assessment before you bid. Understanding the condition gap between a claimed "excellent" and what the photos actually show is valuable when deciding your maximum bid.

Copart and IAAI (Insurance Auto Auctions)

Best for: Mechanics, rebuilders, parts cars, and experienced buyers who understand salvage vehicles

These are the primary salvage vehicle auction platforms. Vehicles here have been declared total losses by insurance companies and range from lightly damaged (hail, minor flood) to completely destroyed.

Price positioning: Below market, often significantly. This is the point. But factor in repair costs and the permanent effect on resale value and insurance options.

Photo quality: Standardized but forensic rather than flattering. Copart and IAAI photos are damage documentation photos, not listing photos. They will show you exactly where the car was damaged.

Access requirements: Both platforms require a dealer license or a registered account to bid in most states. Individual buyers typically access these platforms through licensed broker services that charge a fee.

What you need to know:

Salvage titles cannot be driven on public roads until repaired and inspected (varies by state)
Rebuilt title vehicles have permanently reduced resale value and limited insurance options
"Run and drive" listings mean the car powers on; they do not indicate drivability
Hidden damage is common, especially in flood-damaged vehicles

Who should use these platforms: Buyers with mechanical knowledge, experienced flippers, and anyone willing to do deep due diligence on a specific vehicle. This is not the right starting point for a first-time used car buyer.

Dealer Websites and Manufacturer CPO Programs

Best for: Buyers who want certified vehicles, warranty coverage, and financing convenience

Certified Pre-Owned (CPO) programs from manufacturers (Toyota, Honda, Mercedes-Benz, Lexus) offer multi-point inspection, limited warranty extension, and roadside assistance. The documentation is the most credible of any retail channel.

Price positioning: At or above market. The warranty and inspection documentation commands a premium, typically $1,500-3,500 over comparable non-CPO vehicles.

Photo quality: Professional dealer photography, usually 15-25 images.

What CPO actually means: Standards vary by brand. Toyota CPO requires a 160-point inspection and offers a 12-month/12,000-mile comprehensive warranty plus powertrain through 7 years/100,000 miles from original sale. Honda and Hyundai offer similar structures. Luxury brands typically have more comprehensive coverage.

Worth asking: Request the inspection checklist. CPO programs produce an actual document of what was checked and what was repaired. If a dealer cannot provide this documentation, the CPO designation is less meaningful.

Making Your Decision

The right platform depends on what you are buying and how much time you want to invest:

Best deal potential: Facebook Marketplace or Craigslist, requires most due diligence
Best documentation: Bring a Trailer (for enthusiast cars) or Carvana (for everyday cars)
Best warranty coverage: Manufacturer CPO through franchised dealers
Best pricing transparency: CarGurus
Highest caution required: Copart/IAAI (salvage auctions), Facebook Marketplace (scam risk)

Whatever platform you use, Dr.Vin's photo assessment creates a consistent standard for evaluating condition. Run it on the listing photos before you invest time in a visit, a test drive, or an auction bid.