Go to the gun file you want to change, and find cost. Some traders may double the price while some may half, i personally think better stuff increases in price while weaker stuff the opposite. Using a faction trader (dolg,freedom) will normally get you a discount but not always.
How 'bout the ammo cost? :confused:
thanks alot! And i found how to change the ammo cost. Go to Weapons.LTX and they're all there.