Wow.. now I feel lucky, I got a villager with 18 emeralds and a book for Efficiency V. But 67 emeralds??? Thats crazy!
Breaking News Villager tries to rip off the owner of empire's best museum, seems like the villager is wanting to trade 67 emeralds which cannot be done.
I believe this is a Mojang problem? Maybe it will be fixed in 1.8, but it happens and there is no way to actually fix it, so you will have to try at getting a different villager
It's an efficiency 5 book. It's too bad, that was the seventh trade and the only one left was paper, so close to another infi.