Hi, I am AmyDoran from SMP2 and I have set up my own shop type. I have a book there that explains it all, but instead of putting out items I am taking requests. In a chest are book and quills where someone can put the name of the item, the quantity, and the price they think is fair. Of course there are limitations that a single person can do, like a diamond for a single rupee or a double chest of diamonds. I may not satisfy someones order immediately, but I do offer a cheap method to gather necessary items, but you do not have to come to me I will check my inbox on here or you can mail me on the game.