I want to sell or offer specific items as the server without having to put them into a storage inventory first.
On the other hand, I want players to be able to sell certain goods to the server without being able to buy them back from that same stock.
For example, at the tavern, cooked meat is sold while raw meat is purchased.
So, a player can only buy cooked meat and can only sell raw meat.
So, I'm making the roasted meat STATIC and the raw meat `PLAYER_SUPPLIED`
(though he can also buy raw meat if any is available—but the innkeeper needs it to sell roasted meat and wants to keep it)—do you see my problem here? 
I'll see if I can get it working that way. 