I'm having the same issue.
Made the deal to buy of a pvp set from him, fronted the first half, guy went afk since than. Been waiting 2 days, doesn't reply on skype or anything.
I'm giving him the case of doubt that something happed in real life, but it doesn't look good. If that happen to be the case ,and shit still goes smooth, I'll vouch , if not you're all warned.