My strat on the gold AH is I just list it at whatever the minimum the game pops up in the window with no buyout. Unless it is something really good. I actually listed 700 Inferno essences at double going rate and after 3 relistings they sold. Someone out there must acutally try and smith some things but it seems like a total loss as everything I ever tried was total crap. And at 100K plus per attempt for high end stuff who would even try it?
And its the most profitable way of making Gold in the game, just look at all the live streamers raking in 100's of millions for crafting for people.
100k is nothing anyway.