Sellers:

https://marketplace.tf/items/523;5;u61

https://backpack.tf/item/2159442031 - b/o: $89.79 = 43 keys

http://www.tf2outpost.com/trade/29209020 - b/o: 32 keys (1 week)

Sold:

https://backpack.tf/profiles/76561198093824881#!/compare/1493942400/1494028800 - sold with 1 key + sweets (14) for Vivid Plasma Sergeant's Drill Hat (40) + sweets (5) = 25 keys (low)

https://backpack.tf/profiles/76561198004517334#!/compare/1493424000/1493510400 - sold for Blizzardy Storm Janissary Ketche (11) + 25 keys = 36 keys

https://backpack.tf/profiles/76561198054758757#!/compare/1494633600/1494720000 - sold for Infernal Smoke Taunt: Battin' a Thousand (18) + Strange Professional Killstreak Australium Tomislav (15) + 4 keys + sweets (2) = 39 keys (outlier)

https://backpack.tf/profiles/76561198048616739#!/compare/1493856000/1494201600

https://backpack.tf/profiles/76561198054758757#!/compare/1493769600/1493856000 - sold with sweets (10) for Phosphorous A Rather Festive Tree (46) = 36 keys

https://backpack.tf/profiles/76561198011321852#!/compare/1492214400/1492300800

https://backpack.tf/profiles/76561198048616739#!/compare/1492214400/1492300800 - sold for Steaming Hat With No Name (24) + Blizzardy Storm Swagman's Swatter (14) = 38 keys

https://backpack.tf/profiles/76561198369394263#!/compare/1490400000/1490659200 - sold for Circling Peace Sign Scotsman's Stove Pipe (14) + Blizzardy Storm Stainless Pot (17) + 3 keys = 34 keys

https://backpack.tf/profiles/76561198068331350#!/compare/1496188800/1496275200

https://backpack.tf/profiles/76561198173257210#!/compare/1496188800/1496275200 - sold with 2 keys for Nuts n' Bolts Dragonborn Helmet (11) + Smoking L'homme Burglerre (13) + Smoking Counterfeit Billycock (11) = 33 keys

http://www.tf2outpost.com/trade/29201851

https://backpack.tf/profiles/76561198088273443#!/compare/1496102400/1496188800 - sold with 1 key for Vivid Plasma Birdcage (22) + Orbiting Fire Hermes (16) = 34 keys b/o

https://backpack.tf/profiles/76561198088273443#!/compare/1495670400/1495843200 - sold for 34 keys

https://backpack.tf/profiles/76561198281226831#!/compare/1495843200/1495929600 - sold for 23 keys (low)

https://backpack.tf/profiles/76561198276562166#!/compare/1493683200/1493769600 - probably scm

https://backpack.tf/profiles/76561198276562166#!/compare/1492387200/1492560000 - ?

Mini's:

Blizzardy Storm Swagman's Swatter:

Sellers:

http://imgur.com/a/qSKjv - b/o's of 14 keys

taking 14 keys

Conclusion:

sales at 23, 25, 33, 34, 34, 34, 36, 36, 38, 39

sellers at 32, 43

taking 32-38 keys