it’s a nice try, but too complicated for the average user, and it’s also completely open to exploitation.
firstly, there MUST be some margin above the “standard market value” of an item, to allow for supply/demand to increase the price of an item over time.
and using this margin, RMT’s will exploit the “current market value” of certain items slowly over time. eventually we’ll be right back to 50k for kepa stems.
if there’s no margin, then there’s no room for upward growth. if there’s no room for upward growth, then the base price of EVERY POSSIBLE ITEM EVER must be individually set by hand, before the market can ever open. then a couple of people will undercut an item on the market (to make theirs sell first or whatever), and suddenly, the price is permanently reduced by a few silvers, forever, because there’s no room to go up.
eventually the market is destroyed because nothing in the server sells for more than a handful of silver. at silver becomes pointless, and no one will ever spend any money on anything -but- basic supplies, because no one will waste their time with the AH since it’s impossible to get a reasonable value for anything. everyone will just be rolling around in piles of silver, with nothing to spend it on. and since no one can spend their silver, trade dies
the game dies
everything is over.
grouping items would be a nightmare. everything would be reverted to baseline when it was put up for sale, because you can’t group items that don’t have the same stats. that amazing enchant roll you just got on a new headgear? gone when you put it up for sale. etc.
alternately, grouping would require that enhancements be shaved down to bare minimums: instead of +XX to Str… ALL items that added Str would add 7 points. and you couldn’t mix-and-match enhancements anymore. any enhancement that affected multiple stats would only/always affect those stats, by only/always those exact amounts.
also, where would the baseline value come from? right now it’s a free-for-all for the first bunch of any given item type listed on the AH… it’s only from a series of sales that the system can decide what a reasonable baseline is.