Auctions
Buying and Selling at Auction
Bidding well and consigning well are different skills, but they rest on the same handful of facts about how an auction actually works. A buyer who understands the buyer's premium, condition reports, and the meaning of "sold as is" bids with a clear head instead of getting swept up in the room. A seller who understands consignment terms, reserves, and how settlement works avoids surprises when the proceeds finally arrive.
This page is a practical companion to the rest of this hub: less about the mechanics themselves, covered in the main auctions guide, and more about what to actually do with that knowledge on either side of the gavel.
Before You Bid: Set a Limit
Decide the most you are willing to pay before the lot opens, and decide it in terms of the hammer price you would need to stop at, not the total you would be comfortable spending. Because the premium is charged over and above that winning bid, your true stopping point has to sit below the number you plan to bid up to, not equal to it. Any applicable sales tax then comes on top of that combined figure as well.
Write the limit down before the lot starts if that makes it easier to hold, and treat the published estimate as a reference point rather than a ceiling. Competitive bidding in the room, or against other online bidders, can push a desirable lot well past its estimate, and the moment to decide how far you will go is before bidding starts, not once it is already underway.
Read the Condition Report, Not Just the Photo
Request and read the condition report for any lot you are seriously considering, and treat a catalog photograph as a starting point rather than a complete picture. Condition reports describe damage, repairs, replaced parts, and other issues that a photo can hide or flatten, and most houses will answer follow-up questions before the sale if you ask them.
"Sold as is" is the standard basis for an auction sale: the buyer accepts the lot in its described and previewed condition, and returns after the sale are limited or unavailable in most cases. That makes the pre-sale questions the only real opportunity to catch a problem. If something about a lot's condition matters to you, ask before you bid, because there is generally no undoing a winning bid once the gavel has fallen.
Selling: Consignment Terms and Reserves
Selling through auction starts with a consignment agreement, the contract between the owner and the auction house that spells out the seller's commission, which differs from one house to the next and sometimes scales with how valuable the property is, whether a reserve will be set, and who is responsible for photography, cataloging, and any other pre-sale costs. Read this agreement closely rather than signing it quickly, since it is where every fee and every condition of the sale is actually defined.
A reserve, the confidential minimum below which a lot will not sell, is usually negotiated between the consignor and the house rather than set unilaterally by either side, and it is commonly tied to the low end of the published estimate. Setting a reserve too high risks the lot not selling at all and having to be reoffered later; setting none, or setting it low, accepts more risk in exchange for a better chance the item sells on the day.
Settlement: Getting Paid or Picking Up
After the sale, buyers are expected to pay for and collect, or arrange shipping for, their winning lots within a window stated in the terms of sale, and that window is usually short. Missing it can carry consequences spelled out in those same terms, so read them before you bid, not after you have already won.
Sellers are paid out after the house deducts its commission and any agreed expenses, on a settlement timeline set out in the consignment agreement, generally following the buyer's payment clearing. The exact schedule differs by house, which is another reason to read the consignment agreement closely rather than assume it will match what a different auctioneer does. For the underlying mechanics these practical steps build on, lotting, reserves, and the estate auction process or the coin auction process, the rest of this hub goes further.
Common questions
What should I check before bidding at an auction?
Read the condition report, note the buyer's premium and any applicable tax, and check the terms of sale for payment and pickup deadlines. Set your top hammer-price limit before the lot opens, since the total you owe will be higher once the premium is added.
Can a seller set the reserve at any price they want?
In practice, no. A reserve is negotiated between the consignor and the auction house and is usually tied to the low estimate, since a reserve set far above what the market is likely to pay risks the lot not selling at all.