Clarisse, I'm not convinced that "most people" *do* want stacks on the AH. When I'm buying (for example) Arcane Dust, what I'm generally looking for is what suits my needs right now, which is usually one or two Dust. I'm not looking to stock up. My experience is that most people do the same thing; if they have to buy a stack, they're going to use what they need and then relist the rest of the stack.

My tactic has generally been to list enchanting mats in stacks of 5, which lets me catch the eye of the "one or two" crowd" without overwhelming the AH with listings.

mensrea, actually, the price at which things are listed *can* be a reasonable approximation of the price at which things are sold, given two prerequisites: first, that you have a (relatively) large amount of data over a (relatively) long time, and second, that your fellow auctioneers aren't dumb. If the other people on the AH aren't dumb, when something doesn't sell, they'll relist it at a different price - either lower (on the assumption that the item was more than everybody wanted to pay) or higher (on the assumption that if something's priced really high, people will assume that it's worth it). Either way, you get the benefit of them refining their auction house prices - but only if you've got the first part down, which is scanning regularly over a long period. Once or twice daily (you certainly don't need to scan more often than twice daily) for a week or two should give you a good idea of what current market prices are; if you don't get a price for an item, that means you get to set your own (since nobody else is selling it!).

katsuya, that is obnoxious. Unlike profession mats, I think people probably generally buy ammo a stack at a time. Who on earth thinks that one arrow per auction is a good idea? (Maybe the idea was that less-savvy players would just buy them up, thinking there was nothing else on the AH?)