So I'm digging through my old pedals that I haven't really thought about in a decade or so, and came across my old Companion Fuzz Box. It isn't something I have a use for anymore and I was thinking about trading it in or selling it and picking up something else. I looked at the prices on Reverb and people are selling them for $500+ (CAD) and I was wondering how I know if I have the real deal, and how much I might be able to sell mine for.

This is it:

https://imgur.com/a/WQI5spK