Re-Suggesting based on the comments on this:

https://backpack.tf/suggestion/5ce76db6d381725b505da53a#comment-5ce7ff3ed38172393e232b3b

It's really a fucking mystery.

Sale 1: Untrace.

https://backpack.tf/profiles/76561198119577562#!/compare/1553558400/1554681600

https://backpack.tf/profiles/76561198304302520#!/compare/1554595200/1554681600

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Sale 2:

Sold With A Few Items For Hot Hazard Warning War Paint (Field-Tested) And Few Other Items. (No Usable Mini)

https://backpack.tf/profiles/76561198304302520#!/compare/1554854400/1554940800

https://backpack.tf/profiles/76561198046571972#!/compare/1554854400/1555113600

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Sale 3: ~40 Keys.

Sold For Scorching Flames Airdog (41.5)

B/O Cap 40, https://bot.tf/stats/listings/Y90850NY

https://backpack.tf/profiles/76561197995378859#!/compare/1553904000/1553990400

https://backpack.tf/profiles/76561198258614357#!/compare/1553904000/1553990400

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Sale 4: ~42 Keys Pure.

https://backpack.tf/profiles/76561198305494036#!/compare/1552003200/1552089600

https://backpack.tf/profiles/76561198079781379#!/compare/1552089600/1552176000

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Usable Sales: 40/42

Going with 40-42 keys.

Thanks to scourge for the premium!