Yes, Tom, that's right.
The seller was insisting on a F&F payment (or bank transfer) he said because he didn't want to lose any money covering the Paypal fees, but I added the 4% onto his price to cover the fees myself and made sure I got buyer protection.
When I made that clear to him he wasn't best pleased about it, and tried to tell me that I was somehow in the wrong for having the temerity to try and protect myself and my money while buying vintage hifi off a stranger on the internet!