@Midnight23 

You never pay any upfront fee as a seller.

Ignore scammers that send fake Paypal emails telling you that you need to pay an upfront fee to verify/upgrade/or any other reason to 'accept' a payment.

You would certainly never have to send funds via another payment processor/bitcoins/ or tokens/vouchers of any sort.

Any fee is auto deducted by Paypal at the same instant the remainder of the payment is credited to your Paypal account balance.

No funds in your balance = you have not yet been paid, even pending/held payments will still show in your Paypal account activity.