Some items are easy to display and others take work.

Art will look best displayed using quality easels, cascading velvet backdrops, and pinpoint spotlights.

Certificates are especially tough. You only have a second or two at the most to grab your potential bidder's attention. If you just display the certificate hardly anyone will stop to read it and your bids will suffer. Try mounting a copy of the certificate on foam board and surrounding it with things that represent the experience to be had. If a certificate is for dinner at a Chinese restaurant display chopsticks, fortune cookies, the restaurant menu and perhaps a picture of a romantic couple seated at the restaurant. If it's for a round of golf display golf balls and tees, a hole flag, golf shoes, and a putter.