It's been a bit so I'll post this again. We have lots of classified adds. Don't use friends and family. Pay pal WIL NOT back you. If the person is a friend or family it'd be dif. Even than you're not being backed. Someone WILL be screwed. Just don't do it.
Now the 3% everyone likes to ask for. Look it they upped a price 3% you could say nothing but the charge otherwise belongs to the seller. There is no way they can ask for that imo. Remind them that.