Not a flea market, but I found a pristine Super 20 Club crystal decanter for 5 bucks with "New York Giants" engraved on one side. It just caught my eye randomly

Not a flea market, but I found a pristine Super 20 Club crystal decanter for 5 bucks with "New York Giants" engraved on one side. It just caught my eye randomly and had a good weight to it. Had no idea what the Super 20 Club was, so I poked around. After a number of emails to sports memorabilia auction sites and a university historian, I was able to identify it. The Super 20 Club was a term for the members of the press/media who had attended the first 20 Super Bowls (amazingly, there's a Super 50 Club). They received sets of one decanter and six crystal old fashioned glasses. Interestingly, the recipients had their names engraved on the decanter, not a team name. One expert I contacted hypothesized that the previous owner of the decanter was a noteworthy (ie celebrity or friend of the team) season ticket holder, who had Giants season tickets for the first 20 years of Super Bowls. It was probably worth about 100 bucks to the right buyer, but sadly broke in an accident some months later. I've also found a football autographed by the '82 Patriots, a Nighthawk X10 router, and some high-end kitchen appliances. I never spend more than 10-15 bucks per-item as a rule of thumb.