To view a breakdown of the fees you're incurring by selling on Reverb, you can always visit your statements page in your Reverb account. Your Reverb bill consists of a 3.5% selling fee for each item, as well as any bump charges you've incurred or shipping labels you've purchased and printed via Reverb.
Any payment processing fees associated with your sale will be deducted directly from your payouts.
NOTE: If you’re located in the United States and you set up your payment method as Reverb Direct Checkout on or after March 7th, 2017, Reverb's 3.5% selling fee will be deducted from your payout instead of being added to your monthly statement. If you sold your first item via Direct Checkout prior to that day, if you’re outside the US, or if you only accept PayPal, your 3.5% selling fee will be added to your monthly statement. You can always view the details of any payout on your Earnings Tab in your Reverb account.