mod_CleanMerchant.zip
Clean all sold items in merchant inventory after close trade window (also increase merchant funds on 30% of sold value) ...

mod_CleanMerchantReset.zip
Start conversation to reset merchant inventory (delete all items), how to use: install, do talk witch junk merchants, uninstall ...

Use one of these mods per time ...

Install/Update: delete old mod folder before unpack new version ...

P.S. If anyone known how i can store array or item tags through savegame let me known in comments ...