I've had the misfortune of being in Ebay/Paypal disputes a few times (as buyer and seller). They do indeed side with the buyer, regardless of facts, documentation, photos, original listing, etc... Once they removed the option to leave negative feedback as a seller it all went downhill. I pretty much don't sell anything of consequence on Ebay any longer as a result.
The feedback thing is rediculous... in the case i cited in my other post, the buyer left me negative after I'd already left him posative before he went psycho on me. Ebay does have a "follow up" thing where you can reply to negative feedbacks to kind of give your side.
BUT they have a follow up for the buyer too !!! So you can say that their negative feedback is BS but then they can come right back and get the last word !
And on the same case, ebay wouldn't take down the negative feedback because they said the case was sided for the buyer even when i showed them that in the case file it clearly says that ebay made an error when deciding the case ( because they didn't review anything before siding w\ the buyer! )