Sale 1:

Sold for a Haunted Ghosts Buckaroos, an Amaranthine Bonk Helm, a bud (3.3 at the time) and 5 keys + 1 in ref

(14.5 + 32.5)*0.9 + 9.3 = 51.6 rounding to 52 keys

No outpost trade

http://backpack.tf/profiles/76561198108516087?time=1432278000 (May 22nd)

http://backpack.tf/profiles/76561198108516087?time=1432364400 (May 23rd)

Sale 2:

Sold with a Terror-Watt Bonk Helm for a Kill-a-Watt Law

(70*0.9) - 10 = 53 keys

http://www.tf2outpost.com/trade/25404642 B/O of 60

http://backpack.tf/profiles/76561198009311051?time=1426489200 (March 16th)

http://backpack.tf/profiles/76561198009311051?time=1426575600 (March 17th)

Sale 3: (outlier, oldest sale)

Sold for a Kill-a-Watt Crone’s and a TW Nanobalaclava

http://backpack.tf/profiles/76561198008608496?time=1426316400 (March 14th)

http://backpack.tf/profiles/76561198008608496?time=1426489200 (March 16th)

Notes:

Mini for the Terror-Watt Bonk Helm: ~10

http://backpack.tf/vote/id/556abc7bb98d88aa408b458e

Conclusion:

Sales at 52 and 53, taking the final range at 52 to 53.