i've sold a few in the past on Ebay but a quick look at the sold list and you'll see that the only domains that sell on Ebay are cheap ones ie $X-$XX at best.
Also, as Bruce alluded to, selling anything on Ebay these days is a huge risk as there is NO seller protection whatsoever ! If a buyer decides to try and scam you out of your item, Ebay will side with them every time regardless of proof to the contrary and you will lose your money and more often than not your item as well. This is why Ebay has become such a scammers paradise. Also bear in mind, Ebay has quite possibly the worst customer service known to man !
If you are going to risk trying to sell a domain on ebay, my advice would be to clearly state in the description that you will only push the domain to an acc at the same registrar ie no auth codes. At least that way, if a buyer does try to scam you, you will have the registrar to back you up ie that the domain was transferred and obviously they know whos acc it was transferred to. At least that way you have something to counter the scammer with if they slap a privacy setting on the domain and claim you didn't transfer it. All academic though as nothing sells on ebay anymore !