So my dad had a really good idea this morning, and I thought I'd share.
There should be a pet that you can purchase for some total of gold that acts as a vendor for your wares.
Imagine, if you will, a 10 slot vendor where you decide what items he sells at what price. You could assign wares from your bags or bank, such as gems or reagents, and set prices on them.
You could sit outside the AH and advertise your items in trade!
you could sell flasks in raid pugs!
You could even do some things I haven't thought of!