In ELEX there's about 39 NPCs with a trading inventory. The "TraderInventory modifier" allows to modify the contained items (savegame modifier).
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In ELEX there's about 39 NPCs with a trading inventory. This tool allows to modify/exchange the contained items. You can choose out of allmost all items in the game to place them in a trader's inventory.
(You can't add items, though. That's why it's called a modifier, not "editor".)
Some goods are ruled by the (Dev's internal) script "OnTradeInfo_RefillTradeItems". Examples: Balder, Healing Potion (It_Po_Healing_medium) or Xander: Magnesium (Torch It_Misc_Flare_Red) You should experience a refill for these after buying (without having ever used the TraderInventory modifier.)
Optional you can "install" another trader ("TradeHelper") who will be present at Sandy Pines. (His inventory can be modified using E-SG_TraderInv_modifier after you've created a savegame.)
Warning: you really shouldn't modify the savegame you just loaded in ELEX! This could cause a loss of data integrity!
remark: when the items in the TradeHelper's inventory are not being unstacked then there's a conflict with another mod using ABE_NPCs_Hostile.elexsec (btw: all other traders' stocks have stacked items - I unstacked the items of the Tradehelper only.)