BidBud

See what a car is really worth, what the listing may be hiding, and when to stop bidding. Advisory only — BidBud never bids for you.

BidBud is a decision copilot for online collector-car auctions. It reads the listing you are already looking at and answers the three questions that actually decide whether a purchase goes well. WHAT IS IT WORTH? BidBud compares the car against a database of more than 100,000 completed auctions and shows you a fair-value range built only from auctions that actually sold. Every comparable is listed with its date, mileage, outcome and match reasoning, and you can exclude any comp you disagree with.. WHAT WILL IT REALLY COST? The hammer price is not the price. BidBud adds the buyer fee, tax, shipping, inspection and a repair reserve to show your true all-in cost, and tells you how much room is left before you hit your ceiling. WHAT AM I MISSING? BidBud reads the full seller description and comment thread and surfaces things a careful buyer would want to check such as paintwork, rust, title notes, service gaps, unanswered questions. It also drafts specific questions you can paste straight to the seller. WHEN SHOULD I STOP? Set a maximum and lock it. Raising a locked ceiling requires you to write down what new information justifies it. In the final minutes the panel simplifies to a single clear read: Bid, Pause, or Walk. BidBud is advisory software. It never places, cancels or automates a bid, and it never uses urgency or pressure to encourage you to bid more. When the honest answer is walk away, it says so as plainly as it says bid. Currently supports Bring a Trailer listings. More platforms coming. BidBud is an independent tool and is not affiliated with, endorsed by, or sponsored by any auction platform.