Hardly anyone on Meepcraft knows that you can sell enchanted items, ( Potions, books, tools, armor, etc.) through chest shops, it's actually quite simple so this is going to be a really quick guide. If you haven't already figured out how chest shops work, check out LR_Davius's guide here http://meepcraft.com/threads/tutorial-chest-shops.2626/
So here are the three easy steps.
1. Hold the item in your hand that you want to sell.
2. Type the command "/iteminfo" This will give you a number (sometimes letters too).
3. Type the number that you get in the bottom row of your chest shop sign, exactly how you see it.
Yep, it's as simple as that. You can now sell any items that want that you couldn't figure out how to before!
Tips!
If you're new at this you may want to test out your shop first with a friend.
Not all enchanted items will have the same number with /iteminfo. For example, if you combine two Protection III books into a Protection IV, it will be different than a Protection IV book that you enchanted naturally.
Enjoy your new shops!