Kill-a-Watt Cold Killer

New price: 28-30 keys

[proof below]

SALE #1 = 30 keys

https://backpack.tf/profiles/76561198166584580#!/compare/1527292800/1527379200

https://backpack.tf/profiles/76561198011321852#!/compare/1527292800/1527379200

Sold for 30 keys.

SALE #2 = invalid

https://backpack.tf/profiles/76561198297554259#!/compare/1523145600/1523232000

https://backpack.tf/profiles/76561198276909822#!/compare/1523232000/1523491200

http://www.tf2outpost.com/user/76561198297554259 - no B/O

Sold for a Searing Plasma Honcho’s Headgear + roughly 2 keys in sweets. Using there.

SALE #3 = 28 keys

https://backpack.tf/profiles/76561198269583230#!/compare/1521158400/1521936000

https://backpack.tf/profiles/76561198164152030#!/compare/1521849600/1521936000

http://www.tf2outpost.com/user/76561198269583230 - no B/O

Sold along ~7 keys in sweets for a Prof KS Australium Sniper Rifle (~35 keys) = 28 keys.

SALE #4 = invalid

https://backpack.tf/profiles/76561198164152030#!/compare/1521849600/1521936000

https://backpack.tf/profiles/76561198048610662#!/compare/1521849600/1521936000

Sold for 22 keys within a day.

SALE #5 = invalid

https://backpack.tf/profiles/76561198048610662#!/compare/1521849600/1521936000

Bought for 22 keys in the sale above and then resold for 22 keys pretty much instantly it seems.

SUMMARY

Sales: 28 / 30 keys

Sellers: -

Going with 28-30 keys.