I actually have the reserve price set low for the vehicle. The buy it now is $21,500 (which is a deal in itself).
It's pretty easy to bid on ebay, when it hits reserve I have to sell to the highest bidder!!
Should also note, you mentioned that you have never bought on ebay. If you bid and are the winning bidder it is a legal contract, so if you need to get a loan for it that should be in place before you place a bid.