I recently sold my 67 Firebird for $20K, cost me $125.00
Last 3 weeks I sold about $318.50 worth of Harley parts, couple different auctions. My total fees were $28.67 for all the auctions
I have been buying and selling on ebay for over 10 years. Yes there is fees but I have no complaints.
Here we go, automobiles, trucks, trailers, etc. First 4 listing you make in a 12 month period have $0 listing fees, $60 selling fee if sold for under $2000 and a $125 selling fee for selling for more than $2001
Your 5th vehicle and up in a 12 month period kind of gets all over the place so here is a link to the ebay help page
http://pages.ebay.com/help/sell/motorfees.html
Parts get a little crazy based on starting price and selling price. anywhere from 9-12% of the selling price.
Then you can add Paypal's 3%. I think its a great secure way to buy stuff but with the ebay fees and their fees it can put a dent in your selling price.
Ebay also offers free "local" classified vehicle ads that advertise's within a 200 mile radius of your house.