2 month old price, price is too low given how easily this seems to sells for more for keys.

Sold for 130 keys

http://www.tf2outpost.com/trade/26498993

https://gyazo.com/4ec54ce39a61b7341597bd8bee40b65b

Sold for 140 keys

http://www.tf2outpost.com/trade/26662403

http://backpack.tf/profiles/76561198069892390?time=1438930800

Sold for 120 keys (claims more but I can only confirm 120, probably best to just ignore this one also considering the above two sales)

http://www.tf2outpost.com/trade/26760471

http://backpack.tf/profiles/76561198090308403?time=1439362800

Sold for Purple Energy Modest (~144 see http://backpack.tf/vote/id/55cbca29dea9e9fa528b4582 , needs a resuggestion but should be good with the corrected range which I use here)

http://www.tf2outpost.com/trade/26221350

http://backpack.tf/profiles/76561198047239660?time=1435906800

Clean sellers:

http://www.tf2outpost.com/trade/26742204 - offers

http://www.tf2outpost.com/trade/26791733 - 145, young

http://www.tf2outpost.com/trade/26564321 - 160 keys, 3 weeks

http://www.tf2outpost.com/trade/26794868 - 150 keys, young

Duped sellers:

http://www.tf2outpost.com/trade/26781566 - 140, young... also my trade (acquisition was part of a bulk deal)

http://www.tf2outpost.com/trade/26788257 - 125, young

http://www.tf2outpost.com/trade/26786784 - 130, young

http://www.tf2outpost.com/trade/26733200 - no price, unbumped