I haven't been able to procure all items (weapons especially) in mint condition as some of these are unique. For each item under each trader you'll find a buying price and a selling price - these prices are from the perspective of the trader, so the selling price is the price that the trader is selling the item for, and the buying price is what the trader will give you for an item in mint condition. These include not only the 'official' traders such as Sidorovich but also common stalkers, Duty members, etc. In each entry in the tables below you'll find a column for each trader in the game.
that can be bought and sold at the different traders in S.T.A.L.K.E.R.: Shadow of Chernobyl, and provides an overview of their inventories. This page features a list of prices for items, artifacts, weapons, etc. The Zone Survival Guide - Traders, Inventory & Prices
