Just to warn you, they charge 40 + dollars to post an auto on Ebay, so it's minimum $40 up front just to post regardless if it sells.

If it does sell you will have to pay a % of the selling price also.

I just tried to sell a car on there and it didn't sell for what I was asking.
To be honest I would try Autotrader, last time I checked $75 charge and they'll post it till it sells. There are some cheaper deals also for shorter posting periods.