Register online in advance. 20 Rockefeller Plz. The second world-renowned auction house in New York. Occasionally, Sotheby's holds sales of less expensive antiques. Search Sotheby's website for the type of merchandise you want to bid for and view their calendar of events.
Most auctions are free and open to the public.
1334 York Ave. A-Z Index Swann Galleries Has two major map and atlas auctions each year, generally in May and December. Every Thursday from Sept.-June, Swann holds auctions. First time buyers need a certified check. It will take you right to the result page of chosen Search Engine.