Buy all button
Option for 24 48 72 hr duration during auction creation
Idk what to call it but if you want to buy something not on ah or at a cheaper price you can create an "auction" to "buy" said item. Others can then visit said auction to continuously sell you the item.

These ideas are wonderful. I'm quite sure we can get the Auction House a little more functional and efficient. Thank you for your suggestion sir.