Dyanni,
First of all, this dude is either a young punk-*****, or just an illiterate man-child. He (it?) obviously didn't read or decided not to abied by the "legal" "binding" rules of Ebay, a respected online auction house. Do as MUCH through Ebay as possible, and even consider contacting a lawyer just to have a letter drawn up showing how he has wronged you.
Seriously, that's a lot of money (to me anyway). Don't let him "keep it" until the other $1400 comes in. Besides, you do NOT want those wheels from him!