Token Shop - Extend Shops with custom curency

Customize Shops where players can buy items for currencies other than Zen. 

Purpose?
Allow players to buy items for Bless or Renas or other things directly from the NPC, tokens created on the server or whatever. If any of you played modern MMOS or older ones like World of Warcraft, they usually have a token that drop from bosses as a "participation" reward. Let's say you are unlucky with the boss drops, but you get enough tokens to buy yourself a piece of armor from the shop.

I imagine it like this:
Applied to every item

or 
Applied to the general tab

The first one is better as you could specify amount on each item individually. Lets say a Fenrir mount would cost 50 Bless and a Bloodangel Sword would cost 50 Renas.

This system would allow players to trade various items for materials, tokens it extends the gameplay so much and I believe you already have the core programmed since you have the flags.
Please consider as an addon or for free it would really add an unique custom feature to IGCN files and gameplay overal🙂