I started at 450, then jumped to 550, then 583, then 658 (they dropped the paper delivery fee). The last number would have been a total of 750 including taxes and fees. None were accepted. The best counter offer I saw was 875, which is about $15 off the current lowest price (Continental). That price may be able to go lower, but I don't think much lower-- probably 850 at lowest. As you said, they probably sell out anyways with their current prices, so why offer lower cost tickets? I'll have to think about this...