The OP doesn't have a problem with undercutting. He has a problem with illogical undercutting. If an item is selling regularly for 2k (based on history) then the logical undercutter would only drop it to 1999 to go to the top of the list. The illogical undercutter drops the price to 1k. The only reason to drop the price by that much is if the item WAS NOT SELLING at the previous price. I see this happen all the time and it really is head scratching.