I know most are foaming at the mouth regarding this topic, but hear me out. The lack of an Auction House (or even a search feature) is extremely frustrating right now. I agree with this, 100%. But...
I can't help but wonder if it's the lack of direction from Square-Enix that's bothering me more than missing the Auction House? I mean, so far...I haven't really thought about it so much when playing. I've been crafting more than I expected I would be, but there hasn't really been a point where I've said "An Auction House would totally fix this"...because what I've been saying instead is "Oh, that guys overcharging for that gear, big time."
But how do I know? SE gave us no starting point for gear. IMO, there should be a vendor selling gear for people to equip that is adequate for the first content tier jump (ie. Rank 10). You should be able to go buy some basic gear from an NPC to equip. This gear, should be priced and should act as a starting point for people to use to logically determine the cost of goods. But...this would artifically "set" the economy, which is something SE said they didn't want to do.
At the same time, if crafting was a little easier in the early game, where there weren't so may sub-combines required to create an item (ie. Look up Hempen Tabard...requires sub-combines in 4 crafts above the base craft, and requires gathering...too cumbersome for Rank 5 gear). That way, it would be less daunting for people to upgrade their gear for themselves, and the "effort-to-cost" ratio wouldn't be so bad. Right now, I see people on Rabanastre selling basic Weaver combines for 50,000+ gil and body-slot gear (ie. Sheep Leather Harness-ish gear) for 100,000-200,000 gil. Seems a little steep for Rank 9-13ish gear...but then again, it takes a LOT of footwork and effort to make these items! And the amount of time to do it all without buying your sub-combines is a little painful.
So really, I think it's less the lack of Auction House and more the lack of direction on SE's part. Crafting seems too cumbersome in the early levels, something that could be tweaked. Guildleves could give more varying starting armor like it did in Beta and then taper off. There's a lot of alternative solutions that could potentially make things better.
Although, I'm not saying an AH would be bad. I'm just analyzing it from an alternative perspective. It's kind of nice seeing people create their own prices without artificial influence...it's just things shouldn't be so daunting and expensive so early on. I would expect more of a curve...with things getting gradually harder per tier (ie. additional sub-combines, harder-to-find materials, etc.), creating a logical increase in cost, time, and pricepoint.