Job: DarkRP Itemstore Shop/Sell/Buy NPC

Hello

I'm looking for a an NPC created that supports the ItemStore inventory system that allows players to sell and buy their ItemStore inventory items directly to the NPC.

I already got a Addon like this but its not like i wanted, its not working properly, so you could edit that or make your own from scratch

And please just apply to this job if you got decent amount of knowledge.