Hammer Price

The winning bid at auction, before the buyer's premium and other charges are added.

Example

A watch sells at a hammer price of 100,000; the buyer pays more once the premium is added.

The hammer price is not what the buyer paid or what the seller received. Both sides pay fees on top of or out of it.

Buyer's Premium — A fee charged by an auction house to the winning bidder, calculated as a percentage of the hammer price.
Seller's Commission — A fee deducted by an auction house from the hammer price before paying the seller.
Reserve Price — The minimum price below which a seller has instructed an auction house not to sell.

A price is a guess between two auction estimates until a hammer actually falls — There is no continuous market here - only comparable sales, an appraiser's estimate, and an auction reserve that can fail to be met. The gap between what an item is 'worth' and what it actually sells for can be wide, and it is measured only at the moment of an actual transaction. (12 min)
Appraising one item: authenticate before you price, not after — Five checks on one specific opportunity, starting with proof the object is genuinely what it claims to be - because a confident price on a fake or misattributed item is not a discount, it is a total loss waiting for a buyer to notice. (13 min)
A round trip through an auction house can cost 40 percent before the item has moved at all — Buyer's premium going in and seller's commission coming out compound into a breakeven hurdle most buyers never calculate - on top of holding costs and, in several jurisdictions, a higher tax rate reserved specifically for collectibles. This lesson is general information, not personal tax or legal advice, and rules vary by jurisdiction. (13 min)