The all_npc_trade_fix.zip file you have requested: Clear Sky / Mods / Singleplayer / Clear Sky -- Any NPC trade fix - 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:
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.Feel free to edit as you please.