The all_npc_trade_fix.zip file you have requested: Modifications / Single Player / A to B Titles / Clear Sky -- Any NPC trade fix (1.0) - 3kb is not available. Perhaps try browsing all files for the game S.T.A.L.K.E.R.: Clear Sky and upload any files you want to share or are missing. This is the only information we could locate:
By Supernatur4LDescription: Allows ALL NPCs to buy weapons/armor/ammo from you instead of dedicated ones at camps.Note: The values are used to match the general rates for the medkits/food etc so it is set at 0.4,0.1 and 0.3,0.1Feel free to This will enable ANY friendly/neutral stalker to buy weapons/guns/ammo from you at the same price as a "trader" at a specific camp. The values are set to match partially those of OL and partially CS vanilla for the medkits, etc.