Sped auctioneer questionFollow

OK, I'm apparently a total and utter sped when it comes to using auctioneer.

I managed to get the selling part down without too much of an issue and thank god for that as I'm currently leveling an inscription alt and those glyphs are getting hellish to sell, but for the life of me I can't seem to figure out the purchasing features?

I'm not to worried about having it scan the whole AH and buying anything that's underpriced for flipping but I would like to set it up so that when I see, say, a herb I want and some moron has 100 singles up for the price I want it can just buy them all for me.

I've been given the impression that it also has an autorun feature, meaning I can leave my toon parked at the AH all day and it'll autobid/autobuy stuff I want?

Can anyone link an idiot's guide or give a simple explanation on doing those basic tasks?

It's not really 'auto' it scans over the items and pops up a window afterward saying 'do you want to buy this' and you hit okay and it does it. Check out the auctioneer forums, I believe they have complete how-to guides there on how to set it up.