So many people just ask this sort thing to happen! ebay is totally safe - IF you work completey within ebay. That way, if anything goes wrong, they will refund you money quite quickly.
Also, don't accept money any way except Paypal. If some buyer doesn't like that - tuff %&$#?@!%&$#?@!%&$#?@!%&$#?@!. It completely protect you.
I have used ebay for so many years, I don't remember how many. I have had 1 rather small problem in all that time - and ebay fixed it immediately.
If you use ebay corectly, it is 100% safe.