I always end up hitting the "buy similar" button to get to the interface. Didn't see a separate Auction House on the map. I'll have to look for that next time I log in.
AHHHH-ha, yeah, I think you're mistaking the Auctioneer for the actual Auction House. Now that I think about it, I bet a lot of people do that. I'm pretty sure I'd have done it too if I had stumbled across the Auctioneer first.
Like Minotaur said, the Auction House (it's actually not a house, but an open-air stage on a platform
) is behind the postal clerk, and down the steps. You can't miss it, there's always a big crowd over there--well, maybe not right now, but you get my drift.
It's actually a bad idea to do all your shopping through the Auctioneer exclusively. He's not going to list everything you might find practical (or just fun) from the Auction House. He also doesn't list every category of purchasable goods. And much of what he does list, you'll have the opportunity to earn shortly through gameplay anyway. I can't dispute that the Auctioneer is a useful NPC, but while I do check in on him from time to time, I have not actually bought anything from him yet.
I held off on even visiting the Auction House until I'd had some adventures in the Tower District. It's an important feature, but shouldn't be a priority while you're first learning the game. In fact, a lot of people skip right past the NPC gear vendors where you can buy stuff with gold, which is a mistake in my opinion.
Some of that gear is actually pretty decent. My solo Cloak Tower escapade was insanely difficult and long (and FUN, I never got bored but still, I doubt I will ever put myself through that again), but I never died once, and I did it all with gold-bought gear, except for a Graycloak's Legacy sword and insignia, and I went through about 100 health stones from one of the founder packs
. I'm sure some min-maxing, twinked-out powergamer could have soloed it in a couple of hours. But the point is, it was doable.