This thing is well overdue for a drop.

Usable Sales

-Sold for 12 pure: http://backpack.tf/profiles/76561198192901325#!/compare/1477526400/1477872000

-Sold for 13 pure: http://backpack.tf/profiles/76561198113083770#!/compare/1476144000/1476230400

-Sold for 13 pure: http://backpack.tf/profiles/76561198202650566#!/compare/1482105600/1482364800

-Sold for ~11.5 keys, rounding to 12: http://backpack.tf/profiles/76561198214788388#!/compare/1482278400/1482364800

-Sold for 13 keys: http://backpack.tf/profiles/76561198130415542#!/compare/1482105600/1482192000

-B/O for above was 12? How... Anywho, pure sale so no caps here: http://www.tf2outpost.com/trade/28668023

Unusable Sales

-Quicksold for 10 keys: http://backpack.tf/profiles/76561198297291814#!/compare/1481760000/1482019200

-Sold with ~.5 keys for a stormy whoopee, high outlier(15 keys total): http://backpack.tf/profiles/76561198204219284#!/compare/1477526400/1478563200 http://backpack.tf/profiles/76561198088305642#!/compare/1478390400/1478563200

Taking 12-13 thanks to the sales above.

ALL credit goes to Mindacos.