Snow marauders here-

Sold for an Aces High Noble Nickel Amassment of Hats(17 Keys)

http://backpack.tf/profiles/76561198138180349#!/compare/1470009600/1470096000

Sold for 15 Keys and ~4 Keys in Sweets(19 Keys total)

http://backpack.tf/profiles/76561198204824055#!/compare/1471392000/1471478400

Sold for 20 Keys

http://backpack.tf/profiles/76561198133534437#!/compare/1467331200/1467417600

Sold for an Electric Hat Protector Head Full of Hot Air(16.5 Keys) and a Balloonibouncer(2.5 Keys at the time)(19 Keys total)

http://imgur.com/a/9SSEF

Electric Hat Protector Head Full of Hot Air mini suggestion

Sold for a Smoking Conjurer's Cowl(16.5 Keys)

http://backpack.tf/profiles/76561198138671383#!/compare/1471046400/1471132800

Using 16.5.

Sales seem to fit, 17-20 Keys should be fine.

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