Originally Posted by
Tuney
Orginaly when the AH was first set up, the 'fee' for posting items was 2 parted. There was a fee based on eather your starting price or Buyout (The higher of the two) the % was based on how long you put it on. The sooner the item would leave the market (Not counting buyout) the lower the placing fee but higher the Cut to the item was and Higher placing fee but lower % cut if placed for 3 days.
But because if you put in a buyout you'd pay that HUGE tax even if it never got that high and you started low. It was changed to what we have now , A fix % cut off and placing price that is based on base item value and that is returned if you failed to sell the item.