Well I just had a shit trade go through... kinda.
The trade actually took place a month ago. The seller was in Phoenix, and I was in Tucson. Because I was not able to pick up the parts myself, I went ahead and told my sister to go buy the parts. Aforementioned parts should have been the externals for the ASR (everything minus the bolt assembly, hop up unit, and inner barrel). I'm finally able to get back to Phoenix today and I find the complete upper receiver (outer barrel, basically) missing. I call up the guy and ask him if he has the outer barrel, he responded yes. I told him I thought the part was included for the price I paid, but he said he thought I said I didn't need the barrel. I corrected him saying I didn't need the inner barrel, and asked how much he would sell the outer barrel for (I offered payment of $5.00...)
He goes to say he believes he can get more for a simple outer barrel assembly, and told me if I upped the price he would be willing to sell. I told him no thanks and hung up. What bogus. Now I'm out some cash and have a completely useless part.
Moral of the story: make sure you're there in person for the sale. Else, you'll never be sure what you'll end up with.