Since I usually get a lot of requests from people about the going price on items so they can see how much to AH it for, you can automatically ask my WoW interface using guild chat or tells and it will send a response with all the info you want to know.
Basically, in guild chat, type the following:
?[itemlink]
Where itemlink is the linked item you want info on. The system will also tell you how much things will sell to vendor, not just the AH. You can send me a tell or just type it in guild chat and it will respond in private with the info.
So it would look something like:
?[wowitem]Major Mana Potion[/wowitem]
I also should mention it works no matter what character im logged in as or if I'm AFK or not. And it will also give you vendor sell info on BOP items as well.
wow thanks shadow! hope we don't spam you too much!