RV auction fees and the buyer premium

The number on the bid button is never the number on the invoice. Here is every fee that stacks on an auction RV, what each platform typically charges, and how to turn a comp value into a max bid that survives them.

The buyer premium

A percentage added to the hammer price, set by the auction house. Commercial platforms — Proxibid, BidSpotter, HiBid-hosted houses, repo specialists — typically charge 10–15%, sometimes tiered so that the rate falls as the price rises. Copart broker sales stack a broker fee on top of Copart's own tiered fees. eBay Motors charges the buyer no premium on vehicles. State and federal surplus programs (GSA Auctions, most state surplus sites) usually charge none at all, which is why a $9,000 surplus motorhome and a $9,000 consignment motorhome are not the same price.

Sales tax

Charged at registration in your home state, on the purchase price, regardless of where the auction was. Some states tax the hammer price only; some include the premium. A few states have no sales tax on vehicles — worth knowing if you are close to a border.

Documentation and handling fees

A flat fee of $50–$300 for title paperwork is common on commercial platforms. Repo houses sometimes add a handling or "loading" fee. Surplus sites occasionally charge a small administrative fee. It is always in the lot terms.

Transport

The fee people forget. A non-running coach needs a flatbed or a tow; a running one still needs fuel, a driver and possibly a one-way flight. Budget $2–3 a mile for a hauler, less for a towable behind your own truck. RVBidFind's all-in figure uses 250 miles by default; set your own on the lot page.

Storage and late fees

Most houses give 5–10 days to collect. After that, daily storage fees start, and unpaid lots are re-listed with the deposit forfeited. Line up transport before you bid.

Working back to a max bid

Start with what the rig is worth to you — the comp value is the market's answer — and subtract in this order: the margin you want to keep (RVBidFind uses 18% of retail by default), transport, doc fee, sales tax, and then divide out the buyer premium. The result is the most you can bid and still come out ahead. Members see this calculation on every lot as Max bid.