When trying to enchant or repair an item using an anvil, the experience cost says "Too Expensive!" This only happened to one item, whenever I put that item on the anvil, it says "Too Expensive!" everytime. This showed up before I added the enchant materials. This happens in creative mode too. So far, I've only seen this on highly enchanted bows. I can't enchant the bow anymore, but I can repair it in creative mode. The experience level I have doesn't, matter. I used a command to raise my experience level to about 24,000, and it still said "Too Expensive!"