You also need to remember that if your the first to sell some thing, lets say an item for 3k and all of a sudden others start selling it for 2k then 1k then 500 your price looks really high. i like the current prices of items but i would like to see what has been sold and for what price. I think it helps sellers see a trend in the market if items are in demand and it keeps them in check from selling items for an absorbent increase. I Like seeing what items have been sold for rather seeing them for what they are being sold at.
Also people are selling worthless sh*t at a high price only because their the only ones selling it.
This is one thing that they have said they don't want to do. In FFXI people would use the Auction House history to their own advantage. Say an item was selling for 20k. They would buy all the items in the market and then resell them for a lot more (We'll say 100k). They then either use their alt, or have LS members rebuy all the items they put up for 100k. Now instead of the AH history listing the item being worth 20k, the person has now made it look like the standard going price for that item is 80k more than it's actually worth.
Now add in RMT, and an elitist mentality and you have a huge mess. Without that gear you're not invited to parties, so that RMT starts looking enticing.. Then you pay real money for the Gil from the RMT (who were more than likely the ones who raised the prices in the first place). This further encourages RMT to do it with other items because it worked so well with the first one. Rinse & Repeat.
I must say that I do miss the AH History a little bit though. It's nice window shopping, but a little frustrating when you have no way to know how much Gil you need to save up to be able to buy that item that looks so nice. Not to mention it was nice to see how often something was sold so you could see if your chances of seeing one pop on the AH were realistic.