I wouldn't personally buy anything unless I could go look at it in person, be in craigslist or anywhere else.
And, if you know you haven't made payments on your rig and have gotten notices, do you really trust people will just keep changing the oil and washing it every week, or do you think some of them might take it out and dog the hell out of it?
I also wouldn't say the guys selling used are trying to get rid of something with problems. I'm sure that is true in some cases, but certainly not all. I bought 2 awesome machines on craigslist, and sold one of them several months later and made money on the deal.
The saying always holds true. Caveat emptor.
The problems in America arenít from liberals or conservatives, democrats or republicans.
The problems are bigots, hate mongers, fear peddlers and opportunists. History has shown that those people are far more dangerous than a few guys who talk differently or wear funny hats.