The problem with the 'buyer is always 200% correct' mentality at ebay can screw small sellers. Or if you only sell something once or twice a year. You're better off using craigslist.
I sold a generator head to a guy on ebay, packed the item perfectly, it got delivered without damage and the guy couldn't figure out how to get it working so I got stuck with having paid the shipping out to the other coast AND the seller fee. I had to issue a chargeback to ebay and fight for two weeks to get the seller fee off my account. Just sell larger ticket items ($100+) locally... not worth the hassle. What nerve does ebay have to charge you a fee for an item that's now un-sold and expects you to pay to sell it again. No thank you.
There are loopholes to the 'buyer is always 200% correct' policy as well. I bought some rare LPs on ebay for a friend and one arrived warped and unplayable, they were supposed to be Near Mint A+. So at $125, I damn well wanted my money back. So I had to escalate the issue through three different levels because the buyer refused to provide a refund and return shipping. So ebay's 100% money back guarantee is bullshit, because when ebay forced the refund back to me and I mailed the item back. Ebay does not count shipping and delivery within the time window for returns, so now the seller has my item and ebay deducted the refund back off my account. I immediately unlinked my bank account and blocked all further transactions from ebay. Luckily I had recently sold an expensive item and had $100 in seller fees due on my account. So I refused to pay because ebay still owes me the $125. They suspended my account because of the seller fees and every 'supervisor' I talked to could not credit my account the difference I had lost. So I cut my losses and just refuse to do business with them.