Selling fees all depend on what selling level you are. Click My Account---> Selling to see what level you are currently at.
The more you sell, the lower your fees! This is all deducted from your total payout, and you are never charged up front for these fees. Feel free to test placing an ask to see your total payout breakdown.
Once you receive your total payout, there are no additional fees from PayPal or from your bank.