Preferably with an NPC. I guess its no longer simple then by definition though Im looking for a plugin that will simply enable people to barter for example 1 sapling and get 1 leaves in return. the idea is basically to give players access to blocks that are otherwise not accesible. for example you could trade in 5 strings and get the new spider web block. most barter and shop plugins requires a virtual currency, or is locked to 1 specific item, ie. gold ingots. so what i want is an easy to setup and configure, npc, chest or sign or whatever, that simply gives x amount of a specific block but takes y amount of another block from your inventory.