#RPGaDay14: Best Convention Purchase

I don't know about usefulness or monetary value, but the convention purchase I had the most fun discovering was a couple of d20 supplements detailing settings from the old Sorcery! gamebooks.

When I found them in a discount bin at BASHCon a few years ago, I didn't even know that such a thing existed. Whatever the system, it's nice to have these settings laid out in a way other than, "if you go north, turn to page 75." Maybe someday I'll use them in a game but, even if I don't, it was fun to find them.