I conducted a crapload of business on Ebay and other sites years ago when Paypal was a free service. They got me hooked and then started charging for it. I still use it, I don't sell on Ebay and others as much as I used too though. And I hust pass the cost of the transactions right on to the buyer. It is extremely fast and easy to use and have never had a problem with more than 400 transactions. I have heard of a few people who have had problems with security and have lost money. . :{ But i guess that could and does happen with any source of money.
Kev