The Kidney Hat, cause it looks like a kidney

Sale 1 15 keys pure

[url]http://backpack.tf/profiles/76561198087526167#!/compare/1457596800/1457683200[/url]

Sale 2 Sold with ~1 key in sweets for a Flies Slouch

[url]http://backpack.tf/profiles/76561198051465249#!/compare/1461024000/1461369600[/url]

Going with 17 keys

Sale 3

Sold with a Pro KS Spy-cicle and ~1 key in sweets for a Spec KS MW Woodsy Isotope SMG

[url]http://backpack.tf/profiles/76561198131809067#!/compare/1461283200/1461369600[/url]

Going with 19 keys

Minis

SMG sold for 22 keys

[url]http://backpack.tf/profiles/76561198067915899#!/compare/1457683200/1457769600[/url]

Sales at 15,17, and 19. Going with a range of 15-19 keys