HenTie let me resuggest. At last, this can be priced.

http://backpack.tf/item/4464038117

Sale 1) Sold for a Morning Glory Tartan Spartan (96) + 5 Keys + ~4 Keys in Items = 105 Keys

http://backpack.tf/profiles/76561198000174125?time=1455091200

http://backpack.tf/profiles/76561198000174125?time=1455177600

http://i.imgur.com/CVPIeJB.png - Credits to HenTie

Spartan Mini

http://backpack.tf/vote/id/56b99acaba8d88c016bd047c - Open Suggestion at 96 Keys

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Sale 2) Sold for a G. Fetti Thirst Blood + S. Subatomic HFoHA (40) + Haunted Ghosts Prancer's (19.5) + Planets Pirate Bandana + Planets HWaH (14.5)

http://backpack.tf/profiles/76561198000174125?time=1455264000

http://backpack.tf/profiles/76561198000174125?time=1455350400

43 + 40 + 19.5 + 14.5 = 117 Keys, which I'm rounding to 115 Keys for neatness.

Thirst Blood and Bandana Mini

Both sold for an Aces Pyromancer's (43 Keys)

http://backpack.tf/profiles/76561198108313456?time=1453708800

http://backpack.tf/profiles/76561198108313456?time=1453795200

Prancer's Mini

http://backpack.tf/vote/id/56bff566ba8d880b526dd113 - 20 Keys

http://www.tf2outpost.com/trade/27713402 - 4 Weeks Unsold at 19

Taking a range of 19 - 20

Head Full of Hot Air Mini

http://backpack.tf/profiles/76561198000174125?time=1455436800&compare=1455350400 - Sold for a Hellfire Steel Toe (40, Credits to HenTie)