There sort of is. I know that other users and I will comment on rehashers who didn’t pull through on their signpost, so look out before you make a trade. Also, there are a few threads in the “Suggestions” forum you should check out, just to make sure.

Unfortunately, there have been a few cases of that. MOST traders on here are nothing to worry about, though. Check the karma, use confirmation tools, and pester the hell out of someone if you don’t get your items in a reasonable time. Also, see your other question’s reply.

I’ve been around since April, and have made a lot of trades; I’ve never really gotten burned as far as them not sending my stuff out. Like my good bud Rebecca said, check their karma.