I've found that eBay can be a good place as long as I follow the rules. They most likely did not care for the reason given as long as it did not conflict with a returns policy. They are highly unlikely to go into the specifics of the dispute and try and research the item you were trying to sell.

Often when you do not state a returns policy they side with the buyer in return disputes. In a way it's understandable that they would prefer to side with the buyer over the seller. If the buyer is left unhappy they are less likely to buy from eBay again it would hurt them and in turn any future sellers, further hurting them.

can I ask what you put for your returns policy?

http://pages.ebay.co.uk/help/sell/yo...rn-policy.html

I usually put a Time Limit and Postage and packaging charges. That way even if the buyer returns it for whatever reason I'm not out of pocket at all, so I'm happy and the buyer is usually happy.