How to make literally all items in the game have a sale price of 0 zeny?

[SHADEzard]

I want to make all monster drops and other game items sold for 0 zeny at merchant NPCs.

I used to know how to change this in itemdb.cpp, but the code is different in this current version of the emulator.

[Start_]

\rathena\src\map\itemdb.cpp -> void ItemDatabase::loadingFinished(){ ->     item->value_sell = 0;