I sold a 28 foot Sea Ray on Ebay. It is a very cost effective way to do a very nice add with a lot of pictures. While it may not actually sell on Ebay itself you may get in contact with a buyer through Ebay.

Ebay does not charge a percentage to sell a vehicle. The listing fee is $40 and the transaction fee is $50 if the vehicle sells. I would see how much extra it is to do a "long term" listing (2 - 4 weeks). Your thought is you are looking to advertise the vehicle for as long and as cheaply as possible. Ebay gets a lot of people looking for vehicles.......