There should be an AH 101 course. Something like this.

• Monks and DH use Dex, Barbs use STR, Wizards and WD use Int. All use Vit. As such, class specific items that don't have that class' attributes are FUCKING WORTHLESS. I've seen 2 handed rare axes with +100 int with buyouts of 200k. Or crossbows with +str and int. NO YOU CLUELESS IDIOT NOONE WILL EVER WANT THAT.

• There are not that many great attributes. As such, any truly expensive item at a minimum should probably have a + class specific attribute and + vitality, or a healthy amount of a specific stat that someone might actually be going for, such as life steal on hit. As such, your rare Bracers with +12 int, health globes give + 243 life, +15% crit damage, increase health globe/gold pickup range by 6, +12% gold find, and monsters give +13 xp are completely, 100% useless to anyone. Quit selling them for 17k gold because they are yellow and have the highest armor rating you've ever seen at level 35.

• Lists, how do they fucking work? Lets say I search for 1 handed rare weapons with at least +30 dex and between level 35 and 40, and get 100 results. Literally 3 second of looking tells me that your socketed rare dagger with 65dps and +50 dex that you are selling for 25k gold is ludicrously overpriced, as i can find 50 similar ones for 2500 gold. As such, YOU WILL NEVER SELL IT. NOT EVEN BY ACCIDENT.

• Economies, how to they fucking work? Your level 55 dagger with good dps +dex, and +vit, it is very useful. But there are literally thousands of them on the AH. This means they are close to worthless to sell on the AH. They will occupy valuable slots that you could save for more specialized items that will sell just as quickly for much more. Everyone sees those big numbers pop up on a yellow weapon and their eyes glaze over and they drop it on AH for ridiculous amounts of money without a moment to check and see how many already are on AH, and how much they are going for.

• I am one of those undercutting bastards. When I see an item for decent stats, I don't think lottery, I think, "Oh, I can get more for this on AH than I can with a vendor". I'm not trying to break the bank, I just want a better return than I'd get from just selling it to a merchant. As such, I under-price everything, make money off moving quantity, not quality. I am not alone.