I don't think, it is that easy.InvisibleFlame9 wrote: A few examples of low earning weapons:
.50 inline muzzle loader - 1,600gm
.45-70 Buffalo Rifle - 1,000gm
45-70 Government - 1,000gm
16GA side by side - 1,000gm
Instead of calculating how many gm$ are directly related to a gun, you need to calculate to how many gm$ you will not have access to, if you do not have it.
In case you already own a Recurve Bow and a .454 the value for a. 45-70 increases to 7600 gm$, as the following missions are accessible as well.