Buying a car on Proxibid means buying from whichever auction company or dealer listed it, not from Proxibid. That seller sets the buyer's premium, the payment deadline, pickup and title paperwork, and Proxibid's user agreement says checking the car's condition and description is entirely on you. Your bid is legally binding, and if the sale falls apart you can still owe Proxibid its own platform premium. So read that seller's Terms of Sale, ask your questions at least 48 hours ahead, and run the VIN before your first bid.
Proxibid is an Omaha, Nebraska marketplace that private equity firm TA Associates bought in February 2020 and folded into Auction Technology Group, which describes it as serving auctioneers of industrial assets. Its roots are industrial auctions, but its help pages list collector cars, vehicles and commercial trucks among the categories too. I read the Unified User Agreement (version 1.23, last updated December 2024) and the Bidding and Buying help page on October 16, 2026. The checklist below follows those documents. Any single auction can override the defaults with its own special terms, and that is the part that actually decides what you pay.
1. Find the seller's Terms of Sale before anything else
The agreement lists default terms that apply "unless and except as expressly set forth" in a seller's special terms. In practice that means two lots on the same search page can have different premiums, deadlines and pickup rules. Read the terms for the specific event, not the last event you bid on. If they are vague about title, ask, and get the answer in writing through the platform. Proxibid's help page warns not to negotiate purchases outside the platform, because without a record it cannot help with disputes.
2. Price two premiums, not one
Per the agreement, the buyer's premium "is set by the Seller and will be added to the high bid." Separately, Proxibid takes its own percentage (the "Proxibid Premium"), which the seller builds into your total. The help page says some sellers pass Proxibid's selling fee on to buyers as part of the buyer's premium. The honest negative is the next clause: if the deal is not completed within 15 days of your winning bid, for any reason, you agree to pay the Proxibid Premium directly to Proxibid, with interest and collection fees on default.
Run the math before the lot opens. If a seller charges 12 percent and you win a pickup at $9,000, you owe $10,080 before tax, title fees, any card fee and transport. Proxibid gives a Buyer's Premium badge to sellers whose buyer fees rank in the lowest five percent of their category, reviewed quarterly, which is a quick way to spot cheaper sellers.
3. Know what a pre-bid commits you to
Bids are legally binding. A pre-bid, or absentee bid, authorizes Proxibid to keep bidding for you up to your maximum, and you cannot remove it without approval from the seller or Proxibid. One clause surprised me: a seller can see your maximum pre-bid and may set the starting bid partly based on it, as long as you are told that access is on before you submit. Bid in live webcast events with care too. The agreement says you have no claim against anyone if the internet fails during the event and the seller is not responsible for missed bids.
4. Inspect, or accept you did not
Section 3.5 says Proxibid is not responsible for errors in titles, descriptions, images or videos, and buyers are solely responsible for verifying condition. As-is items are supposed to carry a clear description of known defects, and the agreement asks you to send questions to the event staff at least 48 hours before the event. Do that. Ask for a cold-start video, the key count, and whether the title is in the seller's name. If the seller offers a preview, go or send a mechanic. Our fleet auction history report post explains what ex-work trucks tend to hide.
5. Run the VIN, then confirm the title
Decode the VIN on NHTSA's vPIC decoder and check that the year, engine and body match the listing photos. Search NMVTIS for salvage, flood or junk brands. Our checking auction history before bidding guide walks through the order. A bill of sale with no title, or a title in someone else's name, can leave you with a car you cannot register at home, and per section 5.11, unless escrow is used, ownership and all risk of loss pass to you the moment you win.
6. Plan payment and pickup the day you bid
The help page says sellers usually email an invoice within 48 hours, listing the premium, taxes and shipping. Payment methods vary; sellers with an APN badge can charge the card on file when the auction closes. The default payment window is 30 days after the invoice, but seller terms often set a much shorter deadline, so trust the event terms over the default. Delivery is your job unless the seller offers shipping, and Proxibid says vehicles and collector cars are often pickup only, pointing buyers to partners like VeriTread and uShip. Leave a car sitting too long and removal and storage fees can apply.
How Proxibid compares with HiBid and Purple Wave
Proxibid and HiBid work the same basic way: a marketplace where each auction company writes its own rules, which our HiBid checklist covers. The difference worth knowing is Proxibid's separate platform premium that can follow you even if the sale collapses. Purple Wave is simpler on paper, one company with one flat premium and one set of deadlines.
CarVins is a licensed CARFAX and AutoCheck reseller and has no affiliation with CARFAX, AutoCheck, Experian or Proxibid. A report through us has lately been about $5.50 for guests or $4.50 for members, roughly $6.75 for both, compared with $39.99 to $44.99 retail, and checkout has the final number. Next to a four-figure premium, it is a rounding error. CARFAX's overview explains each section.
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