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For sports card collectors, perfection is the goal. All four corners must be sharp. The photo needs to be centered. It has to be just so. Thankfully, there's hasn't been threat of bubblegum stains for decades. In today's memorabilia market, howeve...

Check your attic or man cave for some collectibles because ESPN is teaming up with sports memorabilia expert Brandon Steiner to examine some prized items and offer approximate appraisals every month.

Welcome back to Three Up/Three Down, where we look at which athletes, trends and gear are running hot or running cold in the sports memorabilia world. Matt Lane, vice president of Sports Images Inc., provides the official 411 on this ever-changing i...