Does PayPal have any fees I need to be aware of?
Yes, as part of their PayPal Purchase Protection, they charge a Seller Fee.
Domestic - 2.9% + $.30, paid by the seller when the buyer is in the same country.
International - 4.4% + $.30, paid by the seller when the buyer is in a different country than the seller.
You can read more here: Transact With Peace of Mind
Please Note: PayPal will not refund the seller for their Seller Fees if you end up refunding your buyer.