https://backpack.tf/profiles/76561198134010248#!/compare/1555027200/1555372800

https://backpack.tf/profiles/76561198021055079#!/compare/1555286400/1555372800

https://i.imgur.com/t2uSssl.png

https://i.imgur.com/e9Z3Dxw.png

Sold for 20 keys, thank you Jarool for providing their sale on the previous suggestion.

https://backpack.tf/suggestion/5cd1a159d381721b745b9802#comment-5cd1a276d381721bf969180d

https://backpack.tf/profiles/76561198134010248#!/compare/1555372800/1555891200

Sold for 23 keys

He got 23 keys and then spent 15 on the Orbiting Fire Grimm Hatte. https://backpack.tf/profiles/76561198275222296#!/compare/1555804800/1555891200

https://backpack.tf/profiles/76561198439410410#!/compare/1555718400/1555804800

Untraceable, the Sticky and Blast Defense don't match in history exchange, but if I had to guess, this user quicksold the Sticky and Blast Defense to get enough keys for the 23 keys above trade, which is why he still has some keys and refined lingering around.

https://marketplace.tf/items/30043;5;u61

March 16, 2019 sold for $35.00 / 1.79 = 20 keys