..I buy and sell gear on ebay occasionally when it is time for a change. I often cringe a the final valuation fees and the PayPal fees on top, but look at them as a form of insurance. On the odd occasion where I have had to raise a case against a seller, or a buyer has not been happy with what I have sent, the ebay system makes it easy and pretty much trouble free to get money refunded and goods returned....
And the reverse is true also. A buyer can claim the goods were no good to begin with, and E-bay and PayPal can and do
take the buyers word and refund the money. Goods returned? Yeah, right--if your lucky.
I sold a set of radios in working condition to someone, and I had the money taken back out of my account because the radios were supposedly DOA. What did I get back? Not the radios I sent to the guy--but a set of the same brand radios that were good only as paperweights. And before you ask--my bad--I didn't record the serial numbers or take any worthwhile pictures of the units I sold.
There are dishonest people all around, and if you're unlucky enough to deal with one of them, you're screwed, unless you act as if everyone is dishonest and is out to get you.
In all fairness, I have sold things through E-bay and had no problems at all with the buyer or the transaction. I only point out that there are instances where the completely unexpected can happen.