My brother Dan likes to use motorcycles (the Ninja kind) for transportation. So one summer he decides he wants to sell the motorcycle (and buy a new one, maybe, I don't really remember). Puts an ad in the paper. Some guy answers the ad. Wants Dan to bring it by his work so he can take a look at it. So Dan shows up at the place where this guy works, Sears in Aurora at 155th. Guy comes out. Dan and he talk motorcycles for a while. Guy wants to try riding it. Dan gives him the keys. Guy takes it for a ride. Dan never sees him again. Walks inside Sears. They don't know who the guy is.
Cops did recover the bike eventually. And not in too bad of shape either.
I don't know if this is exactly how the events took place. That's how it was relayed to me by my other brothers and my mom.