Let me add my 2 cents to this thread since it seems to be going all over the place. As people have mentioned, Auctioneer + Enchantrix is awesome. You may also want to download a mod called Bagsort from Curse or another reputable mod site. The newest version allows you to sort all your bags by typing /bagsort AND your bank (when you have the bank tab opened) by typing /banksort.

The bank sorting ability is a godsend! Unfortunately, it does not sort the Guild Bank, but I'm keeping my fingers crossed.