Ohh, I got It.
[ADD] Added an option checkbox 'Keep "Sell excess" checkbox by default' in Auto trade group. Once checked, its allow sell goods not aligned by kingdom cost in automatic mode.
[FIX] Rare bug with excess, which do not buy some goods in merchant.
[FIX] Now if excess is set, may sell items even if merchant has nothing to sellGralad
, in your case, you need to add all 1-level groups (Goods, Storage, Furniture, Mechanism, Tools, Weapons, Armor) one by one with setting Material quality checkbox to "Masterfull and less" for sell all goods except legendary. And activate new checkbox. Please try it and reply there.