It's completely free to post an item for sale on HopUp. When your item sells, the fee is 7.0% (transaction fee) + 3.0% (payment processing) of your listed price plus shipping (if you selected to charge the buyer for shipping). The minimum fee is $1.99. HopUp pays out to the seller when the sale is completed (read more about payouts).
When are fees deducted?
Selling fees are deducted before we pay out to you for a completed transaction. The amount shown in your seller account represents your earnings after deducted fees. In the event of a partial refund sent to a buyer, the transaction fees are based on the original sale amount, and not the new amount after the partial refund.
Read more about cancellation fees here.