Being forced to accept papypal is definately a con, its just a convenient way to squeeze extra fees out of sellers. Then paypal are able to hang onto your money for an extra few days to earn interest on it.

Ebay and other auction sites existed well before paypal and millions of transctions were completed without any hassles.

Sellers should be free to decline paypal as a method of payment and if buyers do not want to pay by other means such as direct deposit then don't bid.

Given the option I would never accept paypal.