The North Star shines upon Scrooge.

https://backpack.tf/item/5195454350

Sale 1) Sold + 32 Keys for a Ghastly Ghosts Jr Ground Control

https://backpack.tf/profiles/76561198156625548#!/compare/1507680000/1507766400 - Seller's Backpack

https://backpack.tf/profiles/76561198301015840#!/compare/1507680000/1507766400 - Buyer's Backpack

http://www.tf2outpost.com/trade/29394158 - Capped by the Buyout of 33 Keys

Sale 2) Sold for a Hot Well-Worn Lightning Rod Shotgun

https://backpack.tf/profiles/76561198301015840#!/compare/1507852800/1507939200

Likely a high Outlier, though this sale could update the Shotgun's price.

Sale 3) Sold for an Energy Orb Minimal Wear Night Owl Sniper Rifle, if not other things as well.

https://backpack.tf/profiles/76561198320858413#!/compare/1507939200/1508025600

This sale could definitely be used to price the Sniper Rifle, as it has no price.

Sale 4) Bulk sale for an Amaranthine Rotation Sensation

https://backpack.tf/profiles/76561198085628805#!/compare/1508025600/1508112000

Sale 5) Bulk sale for a Vivid Plasma Hong Kong Cone

https://backpack.tf/profiles/76561198002492237#!/compare/1508025600/1508112000

Sale 6) Sold for 34 Keys

https://prnt.sc/hb2o0t and https://prnt.sc/hb2qga (Thanks Plantlord)

Sale 7) Sold + 6 Keys for a Starstorm Insomnia Lil' Bitey (45 Keys)

https://backpack.tf/profiles/76561198056693546#!/compare/1508803200/1508889600

45 - 6 = 39 Keys

Bitey Mini

https://backpack.tf/profiles/76561198113270591#!/compare/1506297600/1506384000 - Sold + ~5 Keys of Mixed for a Frostbite Minnesota (48.5 Keys)

https://backpack.tf/profiles/76561198113270591#!/compare/1506816000/1507161600 - Sold for a Terror-Watt Deep Cover Operator (46.5 Keys)

Averages to 45 Keys.