This pedal is in perfect working order- just excess to my needs.
QR Code Link to This Post
Specs here: https://www.boss.info/us/products/fv-500h_500l/
It has a min/max volume control which is really handy if you don't want your signal to be muted in the heel-down position. There is also a control on the underside of the pedal which allows you to dial in the resistance.
Firm on price, and not looking for trades atm- will remove ad when sold.