Can't find a suitable answer anywhere else so i'll ask here.
Stalker 2, Huron the trader in the Slag Heap keeps everything I sell him in his store inventory. So far this means nothing but being able to buy back loads of ammo and meds at a loss but there is also a shitload of guns, suits, pdas and notes that clutter up the store.
Using the common reset trader inventory method that pops up in a web search does nothing, and it seems no one else has this 'problem'.