Being the grinch that I am, I stopped giving any feedback at all for buying or selling on eBay. The principal being if anything ever goes wrong, feedback is your only weapon.
After a seller started harrassing me by telephone after I gave them neutral feedback for shipping crap (not negative because they did refund me after I sent it back) I stopped giving feedback altogether. Never again. I avoid ebay altogether now for anything of value, and avoid paypal for everything.