Job: Grand Exchange

Looking for a grand exchange addon like the game runescape, it needs to work with my inventory system i will provide functions, you can search for grand exchange runescape to see how it works, basically you have items in your inventory then walk to an npc and all players can sell and buy from that npc ( all items in the G.E are from players, so its basically player driven)

ONLY COMPETENT DEVELOPERS WITH GOOD REPUTATION, i dont like repeating myself a hundred times, so scammers and darkrp devs go away