4 month old price!

Sale 1:

Sold for 167 keys + Sweets (~5) = 172 (rounding to 170 keys)

[no outpost trade]

http://backpack.tf/profiles/76561198008614725?time=1451635200 (January 1st)

http://backpack.tf/profiles/76561198008614725?time=1452153600 (January 7th)

http://backpack.tf/profiles/76561198008614725?time=1451635200&compare=1452153600

Sale 2:

Sold for 129 keys + Specialised Australium Minigun with "good" parts (~26) + Sweets (~10) = 165 keys

http://backpack.tf/profiles/76561198201364639?time=1451894400 (January 4th)

http://backpack.tf/profiles/76561198201364639?time=1452240000 (January 8th)

http://backpack.tf/profiles/76561198201364639?time=1452240000&compare=1451894400

http://i.imgur.com/hZ89uGM.png

Notes:

No other sales within the past two months that I can track. This should be fine.

Conclusion:

Two valid sales at 170 and 165 keys. Taking a final range of 165-170 keys.

Feel free to support/counter my suggestion!