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 purchased a majority stake in 2020 for a reported $250 million. 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.

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.

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 BaT publishes every result -- including no-sales, withdrawn listings, and final prices.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.

Lower fees. Traditional auction houses charge buyer's premiums of 10-12% or more, with no cap. BaT charges a 5% buyer's premium capped at $5,000. On a $100,000 car, that's the difference between $5,000 and $10,000-$12,000 in fees.

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.

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.

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 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.

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.

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.

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.
  • Mecum and Barrett-Jackson have expanded their online bidding capabilities, essentially adopting BaT's playbook for their existing inventory.
  • Collecting Cars and Cars & Bids have launched as direct BaT competitors, with varying degrees of success.

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:

  1. Made it easier for new collectors to enter the market with confidence
  2. Compressed dealer margins (dealers can no longer rely on information asymmetry)
  3. Created a permanent, searchable record of market activity
  4. 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.

Whatever you think about individual BaT auction results -- and some are undeniably wild -- the platform has made the collector car market fundamentally better for participants on both sides of the transaction.