Top of the Mornin' to ya.

http://backpack.tf/item/3772188087

Sale 1) Sold for a Green Energy Stainless Pot (45+ Keys)

http://backpack.tf/profiles/76561198043936328#!/compare/1475798400/1475884800

http://www.tf2outpost.com/trade/28512058 - Capped by the Buyout of 45 Keys

Given the comments on the Stainless' open suggestion, I'd say it's worth over 45 Keys.

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http://backpack.tf/item/3387027656

Sale 2) Bulk Sale for an Electrostatic Crone's Dome

http://backpack.tf/profiles/76561198082252169#!/compare/1470700800/1470873600

Sale 3) Sold for a Circling Hearts Respectless Rubber Glove (37.5 Keys) + 6 Keys

http://backpack.tf/profiles/76561198109838613#!/compare/1470960000/1471046400

37.5 + 6 = 43.5, which rounds to 44 Keys

Respectless Mini

http://backpack.tf/profiles/76561198111941332#!/compare/1472688000/1472947200 - Sold for a KaW Wet Works (20 Keys) + MN Hive Minder (17.5 Keys)

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http://backpack.tf/item/3348010298

Sale 4) Sold for a Catastrophic Companions (24) + 12 Keys

http://backpack.tf/profiles/76561198027694776#!/compare/1471305600/1471392000

24 + 12 = 36 Keys