The term 'ACTION AT SOTHEBY'S' refers to the job of a bidder at the auction house Sotheby's. A bidder is responsible for placing BIDS on items during an auction, and must be knowledgeable about the items being auctioned in order to make informed decisions. Bidding is a competitive process, and bidders must be prepared to outbid other potential buyers in order to secure the item they are interested in.