Some stuff i found in the past includes, pens, pins, badges, patches, telephone chip card, paper, id's, rings, money(dollar bills and 5$ dollar bills), sunglasses, dirt, coins, whistle blower, pills, etc.
Once in a flea market i bought a BDU uniform for $3 and found 5$ inside!! hahaha made 2 bucks on that uniform!
anyway just curious to see what kind of stuff you guys have found
cheers