HTO is a mini-mod which redesigns the trading system in Stalker as well as other gameplay elements related to looting and selling items. HTO 2.0 is an expansion expected to be released at a future date. If I abandon this mod I will not fail to let the community know first! So hang in there.
These 5 images show most of what Sidorovich, Barkeep, and The Scientist sell in this mod