Yeah, the fee is 10% + the listing fee. You only pay the PayPal fee if you withdraw the money, I don’t do that so I can’t remember if it’s a percentage with a maximum per withdrawal, but I think it is.
If you can leave the money and spend it with PayPal then it’s a decent deal, you definitely get more than 10% extra with the bigger market on ebay, if you put the item up at the ebay price on here you’d either get no interest or you’ll get haggled down, then have to throw in free postage.
It’s very easy to use PayPal to buy things I find, ebay obviously, but lots of bike shops take it too and if you’re buying stuff second hand etc.