Having never had a mental breakdown, I have no idea how hard it may be under those circumstances to do some of the things you've mentioned. Have YOU ever had a mental breakdown?
It was HCloud who assumed the guy was trying to use whatever he's going through as an excuse for not following through on the deal. If you guys want to assume he's lying and using it as an excuse for not getting back in touch with you yet, that's your business, but don't use it as an excuse to jump on me when all I'm trying to do is give the guy and his friends the benefit of the doubt. Seriously, if just trying to cover for a friend, who would come up with mental breakdown? No one is saying it's a fact that's what's happening, but, it is a fact that it has been known to happen.
Proper channels is understandable, but I doubt I'm the only person who picked up on some of the additional tone in HCloud's post regarding his "nice gentlemen friends" dealing with people who have had "mental breakdowns". IMO, that kind of thing is a just waiting to go off...especially if the guy you're talking about is reading all this stuff too...