Gee, that's alot of nice hats you got there.

Sold for an Aces High Hot Dogger(12 Keys with Overpay) and a Purple Confetti Helmet Without A Home(12 Keys with Overpay)(24 Keys total)

http://backpack.tf/profiles/76561198013226303?time=1441350000 (September 4th)

http://backpack.tf/profiles/76561198013226303?time=1441436400 (September 5th)

Sold for a Max's Severed Head(~28 Keys at the time) and 1 Key(29 Keys total)

http://backpack.tf/profiles/76561198072147007?time=1442214000 (September 14th)

http://backpack.tf/profiles/76561198072147007?time=1442300400 (September 15th)

http://www.tf2outpost.com/item/440,4130920316,251,5 Shako History

Sold for a Cloud 9 Human Cannonball(24 Keys with Overpay) and ~4 Keys in Sweets(28 Keys total)

http://backpack.tf/profiles/76561198108890309?time=1441954800 (September 11th)

http://backpack.tf/profiles/76561198108890309?time=1442041200 (September 12th)

Sold for a Miami Nights Master's Yellow Belt(27 Keys with Overpay)

http://backpack.tf/profiles/76561198054306954?time=1447488000 (November 14th)

http://backpack.tf/profiles/76561198054306954?time=1447574400 (November 15th)

http://www.tf2outpost.com/item/440,4323312605,251,5 Shako history

Sales seem to fit, 24-29 Keys should be fine.

Additional Proof/Counter-Proof/Constructive Criticism/Feedback is always appreciated.