date a gun
Gun store.
Depends on which gun and condition, condition, and condition...
50-100 USD
No way to answer without knowing who made it.
Is it an old vintage staple gun, then it could be worth something, if it is in its original state and case. If it a new one, its worth what you paid for it. Somepeople that are staple happy consider it priceless.
What model is it. How old is it, what condition is it in, is it still working?
It could be anywhere from 30-100 years old and worth 50-300 USD
You can order parts at www.wisnersinc.com
25-75 USD
10-100 usd
Not old enough to be worth much at the gun show but definitely old enough to hang on to. Just my thoughts.
Depending on EXACTLY what you have and its condition, 50 to a few thousand USD.