One of the many reasons that selling on Ebay is almost not worth your time. My buddy sells quite a bit of stuff on there. The other scam is they will order something, claim they never received it (even if you have tracking information) and Ebay will refund their money and deduct it from the seller's account. Hard to make a go of it on there anymore.
Exactly why I would never sell on there, OR accept Paypal. I have heard so many stories where sellers (in the right) got burned by them. No seller rights - it's all geared for the buyer even if they pull an obvious scam.
