It does suck how Ebay always sides with the buyer
I'm always very carful when it comes to buying stuff on Ebay, if they don't have 100 solid feedback, I'm cautious and don't buy anything too expensive.
I guess in this case, you get fucked as a seller. I've sold a few things before and luckily I never had that problem yet.
Like someone else said, always post a lot of pics when you sell, that's what I've always done, that way the person that's buying sees exactly what they're getting and I know for me, when I buy, the more of an item I see, the better.