Never tried to sell domains on Ebay. I've also never searched for any to buy on ebay. Only time I see domains for sale on ebay is when a member here posts a link to a funny sale.. e.g. people selling www.mydomainisforsaleonebaycosno-oneelsewillbuyit.com type domain sales.
3 kinds of domain names sell good on ebay, that is 2 or 3 letter ones and really good ones that stand out. And dirt cheap names, them are the 3 kinds that sell well on ebay from what I seen.