$75
10-100 usd
25-100 or so
50-100 or so
25-75 USD
Panzer derringers were cheap imported guns. The manufacturer is not available. Best place to try is a gun show, or one of the big name parts dealers like Numrich.
10-50 usd
I have one of these also and wondered the value. Made in USA. PO6134 and Firearms IMP.EXP. Miami FL and Panzer stamped on gun.
20-80 usd
10-60 usd
50 or so
No way to tell based on your description.