You should've gotten a bill of sale stating exactly what the trade was for and taken photo documented pics to show what you got in the end! I'd just go down there and be polite at first but knowing me I'd nut up and hit him in the jaw for being gay! But you should save your PM and see if QD or one of the other Internet guru's can get an IP trace from his SN and get that printed out along with what he said he was going to trade! You can always go into small claims court with detailed pictures (showing the correct length of the subs with a tape measure, etc). They may say it's your fault for not checking while you were there but people do randomn dumb shit all the time so as long as you plead your case you might be ok! I doubt he'd let it get to court though! Looks like one to get scared and cough back up the wheels!