Reverb fee changelog
Verified against the official pricing page. Open the Reverb calculator.
Initial verification from https://reverb.com/selling/selling-fees: a 5% selling fee on the total sale amount including shipping (minimum $0.50, capped at $500 on a $10,000+ sale), plus a payment processing fee of 3.19% + $0.49 (2.99% + $0.49 for Preferred Sellers) on the full order amount including tax. No listing fees.