sold about 7 on ebay over the last few years,never had any trouble at all,but dont expect fortunes for them as its just like a auction,the cars are very cheap.
Make sure you get deposit through paypal then a cheque for the rest. I made the mistake of accpeting the whole fee through paypal the first time I did it - over a hundred quid commission to them - ouch!
I sold my old Sierra (well looked after GLS) on ebay last year, and got more than twice the price I had advertised it for in a local paper. Buyer arrived in four hours and paid cash.+++++