it went from 3k to 4.5k to 5k...who knows how much he paid.
Hey man, solve the problem really easily, without ever worrying about whether its stolen. Go online, buy a GSXR750 frame of that same year WITH a title, switch everything over to it, bahda bing bahda boom you got a bike that has only been titled to you. Problem solved. Dont get the police involved, cause if its stolen youre fucked.