You asked him to pay the paypal fee, he essentially asked you to pay for his O2 sensor shipping, go ahead and ask him to pay for your fascia shipping. Theres a certain point where a line is drawn, and if i were trying to sell something i wouldnt exactly split hairs over 5 dollars. If i had another buyer in line to pay full price id certainly go to them, or tell him im going to wait another day or two to see if there are any other offers instead of calling him a retard. But thats just me.