The guy who bought it from the pawn shop could be a super-nice guy who thought he got a crazy good deal on a decent bike ... or he could be the thief's third cousin, and the guy who sold the bike to the pawn shop could be his brother-in-law, and the guy who owns the pawn shop is his other sister's father-in-law.

Everybody loses out in this case ... but the OP at least gets to (essentially) buy his bike back for probably what the pawn shop sold it for.