You cannot auction an item with used charges.

[Oculus]

I bought a wizard oil from the AH and just saw it only had one charge. Why is this allowed? Luckily I noticed before I took it to raid.

[Bioness]

Some people like to be dicks. Live and learn.

[The Shortest Path]

You aren't supposed to be able to do that, though. You could not in retail.

[gotmilk0112]

^At least, that's how it worked in TBC. If you tried to put it in the auction window, it would tell you that you can't auction an item with used charges. Not sure if that was enforced in vanilla.