Frosty.

Sold for 28 Keys*

http://backpack.tf/profiles/76561198021228339?time=1443423600 (September 28th)

http://backpack.tf/profiles/76561198021228339?time=1443769200 (October 2nd)

http://www.tf2outpost.com/trade/27062006

*The Keys were obtained after selling a GE Rotation:

http://backpack.tf/profiles/76561198040398674?time=1443682800 (October 1st)

http://backpack.tf/profiles/76561198040398674?time=1443769200 (October 2nd)

http://backpack.tf/profiles/76561198094923192?time=1443682800 (October 1st)

http://backpack.tf/profiles/76561198094923192?time=1443769200 (October 2nd)

Sold with ~4 Keys in Sweets for an It's a Puzzle to Me Smokey Sombrero(32 Keys with Overpay)(28 Keys total)

http://backpack.tf/profiles/76561198113942601?time=1450252800 (December 16th)

http://backpack.tf/profiles/76561198113942601?time=1450425600 (December 18th)

http://backpack.tf/profiles/76561197981862213?time=1449993600 (December 13th)

http://backpack.tf/profiles/76561197981862213?time=1450425600 (December 18th)

Two sales, 28 Keys should be fine.

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