hints at new (gun using) class in-game

[mbncd]

That's Maelvan's Gate, it's not an auction house at all, nor was it ever one, but actually the ACN's Guild (it was meant to be this even in 1.0 - it had the ACN class symbol on the map).

I believe mbncd is refering to the building nearby Maelvan's gate. It was actually across the way behind a locked gate with a gavel on a placard over the door.

Right, what I was referring to was a building on the south side of the ferry docks, near where the aethernet node is now but further south. Unfortunately, it no longer exists since Bahamut's attack.

Edit: I'm looking for online pics now. Here's a map showing the missing land mass. Can't find a pic of the place itself.

Edit 2: Here's a map of what Limsa is like now, for comparison. Still no sign of the auction house amongst these zillions of screen shots. Very hard to find due to the phrase commonly being used for non auction house related things. I really wish people would use FFXIV terminology for FFXIV things, it would make it so much easier to find stuff like this... Enough whinging from me though, back to the hunt.