http://www.tf2outpost.com/trade/25813825

http://www.tf2outpost.com/trade/25333210

--- asking for 20 keys

--- was offered an OF milkman 1 month ago (20 keys minimum)

http://www.tf2outpost.com/trade/24849326

--- sold, quicksold for 18 keys

none of these have offers:

http://www.tf2outpost.com/trade/25569959 --- 3 weeks old (can't find sale)

http://www.tf2outpost.com/trade/24254691 --- last offer was 2 months ago, then 4 months ago (outdated sale)

http://www.tf2outpost.com/trade/25682356 --- 2 weeks no offers (outdated sale)

http://www.tf2outpost.com/trade/24536706 --- 3 months, last offer 2 months ago (outdated sale)

--- all of the above are asking for at least the outdated price

outdated asking prices get no offers, 20 keys gets offers, 18 quicksells