Read the title and it will give you all the information you need...
Oh and it's also quiet (No droppers [Unless you put the wrong item] or pistons!) and infintly expandable (Infinte trades)! But I figured the title was alredy quite long...
If you want a tutorial write it down in the comment section below and I might make one.
*I added a feature that will return the items you put if there weren't any trades with those items.

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