E-Bay sells a snipe program call E-Snipe
The buyers is charged 1% of the selling price
That is chraged to the buyer

I know of a couple on bidders who if you put in a high bid will run the bid up
Example your high bid is 98.99 but the bid is a 15.00 they will test your high when they don't want the product
If you want to discuss further will do by e-mail