PennyAuctions.info

Depends what you mean by an "auction race".

In UK our definition of an "auction race" is where the weight that the horse carries is dependent on the sale price their sire’s yearlings achieved at stud. These races ares known as "Median Auction Races" (they take the median price the sire achieved at the sales).

Here is the definition of an Auction Race: http://rules.britishhorseracing.com/Instructions&staticID=43600&single=1&fromsearch=1

If you are refering to a a race where the winning horse can be bought afterwards, these are known in the UK as "Sellers", any other horse in the field can be "claimed" (ie the owner/trainer sets a price before the race that they would be willing to accept for the horse. If someone offers that price they must sell the horse to them).

These links take you to the Rules of British Racing and will explain a bit more the difference between selling and claiming races:

Claimer: http://rules.britishhorseracing.com/Orders-and-rules&staticID=8000&depth=2&single=1

Seller: http://rules.britishhorseracing.com/Orders-and-rules&staticID=17500&depth=2&single=1

Rule 96: http://rules.britishhorseracing.com/Orders-and-rules&staticID=64100&depth=3

Rule 97: http://rules.britishhorseracing.com/Orders-and-rules&staticID=65200&depth=3

Rule 98: http://rules.britishhorseracing.com/Orders-and-rules&staticID=67600&depth=3

Rule 99: http://rules.britishhorseracing.com/Orders-and-rules&staticID=68300&depth=3