Uncraftables/ Economy

I know alot on the server want legit items but i feel it is unfair to them when other's get items that are not craftable. I have been thinking of offering items you cannot craft in a way that would make them more legit. I figure a purchase system would work.

Example: Circle stone blocks. Trade a certain amount of one item for certain amount of circle stone blocks from me. I would be the only one doing this, at least for now, so i know things are being done correctly.

I was also thinking of implementing an economy into the server. Not sure how this works but i will get more info. I'm not sure if default prices would be fair but i would get opinions before i set it up permanently.