How can I set an item to be unsellable ?

[martinx09]

Is there a way to set an item to not be able to be sold to an npc?
I'm using IA Julia 4.6 Source

[MentaL]

[KarLi]

you can check for example Quest items, the way they are coded in item.txt for example and try adding the settings the same way for other items / client and server side.