Hello Crafters!
I think it might be a good idea to add an option for the Trade-o-mat. So it can accept all items instead instead of a specific item, but you'll still receive the reward. So you can open up some ToM-shops, that buy random items, so you can scrap them.
People "sell" their items, and they get a reward. And you can easily make scrap --> uu-matter --> diamonds 
Kind regards,
Kevin