Unless I am mistaken, there is as of now no way to get the mending enchantment as it can only be found in dungeons generated in 1.10, and I do not believe there are any in this world (correct me if I am wrong). Therefore I would request a mending book be added to the shop.
Additionally I would like to have player markets. Usually I see this done in the form of a chest with a sign that says a price for an item and you click on the sign, but really any way at all for players to sell items to others both easily and also where they don't have to be online would work. This way money would become more valuable as it would be easy to buy any items that people are selling.