I listed my truck for auction. The truck sold. The buyer did not pay.

I relisted the truck again. It sold and the buyer did not pay. What am i doing wrong. This is a $3000 Toyota 4 wheel drive 2002 driver truck. A high mileage driver that will drive anywhere in the USA. What am i doing wrong. Is it me? or is that ebay just don't punish buyers who don't pay. I am going to relist it again. Can somebody tell me how to sell my truck. Read more here.