Since the maintenance on Lordaeron on May 2, some of my items which I had previously purchased either from a vendor or through the auction house is no longer able to be auctioned.
The items in particular are:
Two of Storms (bought off AH)
Enchant weapon - unholy (bought off AH)
Cat carriers - assorted (bought from vendor).

I've never bought items through the player trade.

The error message I'm getting is that I cannot post auctions with used charges.