I hate undercutters, but it's the nature of this poor "AH" design.
The only way to get to the top of the list, to be the first purchase considered, is to undercut. It doesn't even matter how much the undercut is.
If your item didn't sell after 2 days, it doesn't matter how much people were undercutting you by, merely that they were undercutting.
Sorry, FFXI had the better AH. You could see a price history, but had no idea whether the other one up was priced above, below, exactly the same as the last sale. It could be for 1 gil, and you had no way to know.
If the last diremite web stack sold for 50k and yours was priced for 10k and someone's first bid was 43k, they'd win and 43k was shown in the price history.
Prices stayed steady, except due to unrelated economy exploits, and intelligent people could still play the AH really really well.