There are no fees charged to sellers* other than standard PayPal charges, where PayPal is used.
Please note the following where PayPal is used:
You will receive a credit via PayPal from the buyer once your ticket(s) are sold. This will include the funds for the ticket(s) sold, plus any delivery charges owed to you by the buyer.
In addition you will receive an overpayment from the buyer for the Twickets fee they have incurred for the transaction.
PayPal will then debit you this overpayment in a separate transaction, and transfer the amount directly to Twickets.
This is NOT a charge to the seller, merely a transfer of the initial buyer's fee to Twickets.
*excepting certain partner events