From Blog to Billion-Dollar Platform
In January 2007, Randy Nonnenberg and Gentry Underwood launched Bring a Trailer as a blog -- a simple site where they shared interesting cars they found on eBay, Craigslist, and classified ads. The name was a tongue-in-cheek reference to the kind of cars they featured: project cars that might need a trailer ride home.
Nearly two decades later, BaT has become the single most influential platform in the collector car market. Hearst Autos acquired the company in 2020. By the early 2020s, the platform had facilitated well over $1 billion in total transactions. It now lists hundreds of auctions per week, with average sale prices in the $30,000-$50,000 range. In 2025, the platform saw a particularly memorable sale: a 2014 Ferrari LaFerrari that sold for $4,475,000, showcasing BaT's reach into the high-end market as well.
The story of BaT is not just about one company's growth. It's about how transparency, community, and technology fundamentally reshaped a market that had operated on opacity for decades. BaT's model has inspired similar ventures globally, with platforms like Collecting Cars in the UK and Car & Classic in Europe, each adapting the formula to their regional markets.
What BaT Got Right
Radical transparency. BaT publishes every result -- including no-sales, withdrawn listings, and final prices. This created something the collector car market never had before: a comprehensive, searchable database of actual transaction prices. Before BaT, determining the "right" price for a collector car required insider knowledge, dealer relationships, and guesswork. For example, results for the Porsche 930 Turbo are now easy to track on BaT, with dozens of public sales showing how condition and mileage drive price.
Lower fees. Traditional auction houses charge buyer's premiums of 10-12% or more, with no cap. BaT charges a 5% buyer's premium (minimum $250, capped at $7,500). On a $100,000 car, that's the difference between $5,000 and $10,000-$12,000 in fees. The cap matters most on expensive cars: on a BMW Z8, which often sells in the $200,000-$250,000 range, the buyer pays at most $7,500 instead of $20,000-$30,000 at a traditional house.
Community-driven diligence. The comment section on each BaT listing is its secret weapon. Enthusiasts, experts, and previous owners weigh in with detailed knowledge: they identify non-original parts, verify VIN history, spot paint work, and share service records. This crowdsourced due diligence is often more thorough than a professional pre-purchase inspection. It is common for commenters to challenge claims such as "numbers-matching", prompting sellers to correct listings before the auction closes.
Accessibility. You can bid from your couch. No need to fly to Scottsdale in January, Monterey in August, or Amelia Island in March. This opened the collector car market to a vastly larger pool of participants. BaT's reach has extended internationally, with significant participation from Europe and Asia, particularly in the Japanese Domestic Market (JDM) segment, where cars like the Nissan Skyline GT-R have seen robust international bidding.
The right cars at the right prices. BaT found its sweet spot in the $10,000-$200,000 range -- cars that traditional auction houses like RM Sotheby's and Gooding wouldn't bother to consign. This segment represents the vast majority of collector car transactions and was massively underserved. The 1995 Toyota Supra MK4, with its iconic 2JZ-GTE engine, exemplifies this range, frequently achieving $100,000-$150,000 on the platform.
The BaT Effect on Prices
BaT's impact on pricing has been double-edged:
Upward pressure on desirable cars. The combination of a large bidder pool, competitive auction dynamics, and the visibility of the platform has pushed prices higher for well-presented, desirable vehicles. The term "BaT tax" emerged to describe the premium that cars achieve on the platform versus equivalent private sales. The Porsche 911 GT3 RS (991) is a case in point, with prices on BaT consistently exceeding $200,000.
Downward pressure on overpriced cars. The flip side is that BaT's transparency has destroyed the ability to overprice average cars. When every buyer can see that the last five examples of a given model sold for $40,000-$50,000, a seller asking $65,000 for a comparable car has nowhere to hide. This is particularly evident in models like the Datsun 240Z, where market-correct pricing ensures swift transactions.
Price discovery for niche models. For obscure or unusual cars -- Japanese market oddities, low-volume European models, forgotten American classics -- BaT has become the primary price discovery mechanism. Before BaT, there was simply no reliable way to determine the market value of a 1988 Toyota Land Cruiser FJ62 or a 1995 Mitsubishi Lancer Evolution III. Now there is. The Lancia Delta Integrale, with its rich rally heritage, has also found a vibrant market on BaT, often fetching prices north of $80,000.
How Traditional Auction Houses Responded
The established auction companies -- RM Sotheby's, Mecum, Barrett-Jackson, Bonhams, Gooding -- have responded in different ways:
- RM Sotheby's and Bonhams have moved further upmarket, focusing on million-dollar-plus consignments where their expertise, provenance research, and global reach justify higher premiums. Recent sales include a 1962 Ferrari 250 GTO at RM Sotheby's for $51.7 million in 2023.
- Mecum and Barrett-Jackson have expanded their online bidding capabilities, essentially adopting BaT's playbook for their existing inventory. Mecum's sale of a 1971 Plymouth Hemi 'Cuda Convertible for $3.5 million (Seattle, 2014) exemplifies their ability to attract top-tier muscle cars.
- Meanwhile, newcomers Collecting Cars (2019) and Cars & Bids (2020) -- online platforms, not traditional houses -- have launched as direct BaT competitors, with varying degrees of success. Collecting Cars, in particular, has gained traction in Europe, featuring cars like the Peugeot 205 GTI and Lotus Elan Sprint.
What BaT Changed for Collectors
For individual collectors, BaT's biggest contribution is information symmetry. Buyers and sellers now operate with roughly equal access to pricing data. This has:
- Made it easier for new collectors to enter the market with confidence
- Compressed dealer margins (dealers can no longer rely on information asymmetry)
- Created a permanent, searchable record of market activity
- Established a community where enthusiasm and expertise are shared freely
The collector car market before BaT was characterized by opacity, dealer gatekeeping, and information asymmetry. The market after BaT is transparent, accessible, and community-driven. A BMW M1 (1978-1981), with its rarity and motorsport pedigree, exemplifies how BaT's transparency has democratized access to even the most exclusive models.
Regional Market Differences
While BaT's influence is global, regional differences in the collector car market persist. In the United States, American performance cars like the Dodge Viper GTS and Chevrolet Camaro Z/28 are staples, whereas in Europe, classic sports cars such as the Jaguar E-Type and Porsche 914 are more prevalent. The Asian market, meanwhile, has seen a surge in demand for JDM legends such as the Honda NSX NA1 and Toyota Celica GT-Four. These regional preferences influence bidding behavior and final prices, making BaT a fascinating study in global automotive culture.
Buying Tips on BaT
Navigating BaT as a buyer requires savvy and strategy:
- Research the Model: Understand the typical sale prices for the model you're interested in. A 1993 Mercedes-Benz 190E Cosworth, for example, often sells between $40,000-$60,000 depending on condition.
- Engage with the Community: Leverage the expertise in the comments section to verify details and gain insights.
- Set a Budget: Factor in the buyer's premium and potential transport costs. A 1978 Aston Martin V8 Vantage might look tempting, but remember to account for these extras.
- Inspect the Listing Thoroughly: Review all photos, descriptions, and service records. A 1972 De Tomaso Pantera may have hidden issues not immediately apparent.
These tips can help ensure a successful and satisfying purchase experience on BaT, whether you're after a pristine Fiat 124 Spider or a unique TVR Griffith 500.