If it's still on there when I add stuff daily, or during my bi-weekly purge, I look at pricing daily, then look at "when was it last sold" every few days.


If its something that hasn't sold in a while, I just remove it. If the price drops too low, I remove it. Otherwise, I adjust the price.


While it might be useful information, I'm not sure if it'll enhance much over what is already out there.