FT has the "Coupon Connection" forum, which I believe requires 6 months membership and 180 posts. It also has a very strict rule about trading but not selling. People do often list expiring items gratis (such as club passes, drink coupons, etc.) but the primary intent is different. Usually people have items of varying degrees of value to someone else and want something of approximately equal value in return. A typical trade might be "I have the right to give elite status on Overseas Air, and I want a 25,000 miles award on Midnight Express Airline, or a systemwide upgrade coupon on Air Rwanda."