Stamp Showdown

From BoardGameGeek:

In Stamp Showdown, you're battling for the win of a high-profile stamp competition. Each round, all players secretly choose a stamp to trade with the market, then reveal together. In ranking order, each trade reshapes the market by pulling in all matching suits and ranks before joining it. Will you strengthen your own collection, or block your opponents at the perfect moment? After seven tense rounds, the final showdown begins, and only the most dazzling poker-style stamp collection will win! -description from the designer