Eh, I pretty much figured this was the idea for the auction house.

I based that off of Dead Frontier.
http://i55.tinypic.com/2uqnk28.jpg
[ignore the trade zone part]

You can search for whatever you want in a simple field.
In this example, I was looking for 9mm (handgun bullets).
Everything is ordered by price (just like our current energy market). Cheapest first (for sellers). And all you have to do is have the money and you can instantly buy it. In cases where there are differing item amounts, the overall cheapest is displayed first relevative to the amount per item.
As you see "Air Jester" is selling 477 bullets for $300 which is $0.62 each,
it's still displayed before "sADE918's" price of $40 since he's only selling 49 bullets which is $0.82 each.

In keeping with the spirit of the game however, I feel names should probably be excluded just like with energy, no one really needs to know who they are buying from since it makes people focus on other things besides the lowest price.

There is one issue though, Dead Frontier, only uses cash, here we have two forms of currency. Personally, I think dealing with crowns only at least for public sales are best. But perhaps like you posted, we could have tabs for energy prices too.