Air America stainless 4500psi tank reg

[lhamilton1807]

Took this off an ancient 4500 CF bottle (born 1999!)
looks pretty clean - some dings & scratches, but it’s stainless and probably bullet proof.

I searched the ‘bay for AA tank regs and couldn’t find this particular model - what’s this worth? Figured someone might want to put together a period build or something.
My only reference: https://www.ebay.com/itm/15574620071...mis&media=COPY

[Super Nova]

I had a couple but I don't remember getting much for them 10-15 bucks each IIRC