Bouncers

https://backpack.tf/item/5265971062 - Gambled a bunch.

https://backpack.tf/item/4953114134

Sale 1) Sold for 4 Keys + 15 Refined

https://backpack.tf/profiles/76561198161891455#!/compare/1553644800/1554422400

Rounds to 4.5 Keys

https://backpack.tf/item/4954169626

Sale 2) ?

https://backpack.tf/profiles/76561198285391452#!/compare/1548892800/1553731200

https://backpack.tf/item/4954972839

Sale 3) ?

https://backpack.tf/profiles/76561198841279602#!/compare/1555977600/1556064000

https://backpack.tf/profiles/76561198396952545#!/compare/1555977600/1556064000

https://backpack.tf/item/4957241714

Sale 4) Not Unusual

https://backpack.tf/profiles/76561198239513168#!/compare/1553040000/1553126400

Sale 5) SCM

https://backpack.tf/profiles/76561198068709170#!/compare/1553126400/1553212800

https://backpack.tf/profiles/76561198920383672#!/compare/1553212800/1553472000

Sale 6) Sold for 3 Keys + 2 Refined

https://backpack.tf/profiles/76561198920383672#!/compare/1553558400/1553990400

Low outlier.

https://backpack.tf/item/5924559472

Sale 7) Bulk sale for a Duped Scorching Flames Team Captain

https://backpack.tf/profiles/76561198169109536#!/compare/1552780800/1553126400

Sale 8) Bulk sale for a Misty Skull Attendant

https://backpack.tf/profiles/76561198264117106#!/compare/1554940800/1555027200

Sale 9) Bulk sale for a Bubbling Crown of the Old Kingdom

https://backpack.tf/profiles/76561198056180801#!/compare/1555113600/1555200000

https://backpack.tf/item/6479921277

Sale 10) ?

https://backpack.tf/profiles/76561198827261786#!/compare/1553299200/1553385600

https://backpack.tf/item/7616196904

Sale 11) ?

https://backpack.tf/profiles/76561197967148103#!/compare/1556841600/1556928000

https://backpack.tf/profiles/76561198026129220#!/compare/1556841600/1556928000

https://backpack.tf/item/4952817997

Sale 12) ?

https://backpack.tf/profiles/76561198091173747#!/compare/1554768000/1556668800

https://backpack.tf/item/5679415316

Sale 13) Sold for 4 Keys + 17 Refined

https://backpack.tf/profiles/76561198091764640#!/compare/1553385600/1553817600

Rounds to 4.5 Keys

Sale 14) Sold for 4 Keys + 17 Refined

https://backpack.tf/profiles/76561198210225228#!/compare/1554249600/1554336000

Rounds to 4.5 Keys

Sale 15) Sold for 4 Keys + 34.66 Refined (0.752 Keys)

https://backpack.tf/profiles/76561198048851745#!/compare/1554336000/1554422400

Rounds to 5 Keys

https://backpack.tf/item/6466175095

Sale 16) Sold for 4 Keys

https://backpack.tf/profiles/76561198089913332#!/compare/1553558400/1554422400

Low outlier.

Sale 17) Bulk sale for an Orbiting Planets Exquisite Rack

https://backpack.tf/profiles/76561198106657658#!/compare/1555459200/1555545600

https://marketplace.tf/items/30763;5;u3007 - Sales at $5.21, $5.13, $9.29, $9.39, $8.99, $8.99, $5, and $5.2

These range from 5 Keys ($8.99 when Keys were ~$1.79 both times) to 5.5 Keys ($9.39 when Keys were ~$1.78).

https://imgur.com/a/FLq2Q8e - Sellers from 4.9 to 5.4 Keys rule 5.5 Keys high.

https://backpack.tf/item/7481131510

https://backpack.tf/item/4953114134

https://backpack.tf/item/4957241714

https://backpack.tf/item/5924559472

https://backpack.tf/item/6479921277

https://imgur.com/a/kMxLZFs - Buyers at 4.17 Keys rule 4 low.

https://backpack.tf/u/76561198204863571

https://backpack.tf/u/76561198817510262