BidATrailer is a free-to-play price prediction game built on top of the world's best collector car auction platforms.
We pull listings from Bring a Trailer and Cars & Bids in real time. Every listing shows the current bid, time remaining, and car details.
Pick a car and enter what you think it will sell for. Guessing closes 3 hours before the auction ends — early guesses can earn an early-bird bonus.
Once the auction closes, we score your guess against the final hammer price. The closer you are, the more credits you earn: ≤1% off → 10 credits · ≤3% → 6 credits · ≤5% → 3 credits · ≤10% → 1 credit.
Your lifetime accuracy % and total guesses determine your tier: Bronze → Silver → Gold → Platinum → Legend. Tiers never go down — every good guess is permanent progress.
≤ 1% off
10 cr
≤ 3% off
6 cr
≤ 5% off
3 cr
≤ 10% off
1 cr
Early bird bonus: 3× in first 24h · 2× in first 48h · 1.5× in first 72h of listing going live.