this is crazy! If I'm not wrong with what I think you're asking, you want to buy stolen coin or one that's gotten by dubious means and have it sold to you at cheaper rate? More like what happens with stollen phone and other devices? How do you even come up with that idea?

Well, the truth is that, if someone successfully steals someone's coin, they pretty much know how to go about there p2p transaction in such a way that they won't end up getting caught and I doubt they would want to do business with you. But then, isn't such idea a dark way of using Bitcoin? If you can associate with someone that steals from people, what makes you different from them? Except I'm misinterpreting what you're saying here if not it's just best to note that you have every tendency of carrying out unethical act.