Fruity PEBBles.

https://backpack.tf/item/757800489

Sale 1) Sold for 160 Keys

https://backpack.tf/profiles/76561198139171368#!/compare/1526601600/1526688000

https://backpack.tf/item/3765864571

Sale 2) Sold for 140 Keys

https://backpack.tf/profiles/76561198055847835#!/compare/1526428800/1526515200

https://backpack.tf/profiles/76561198043936328#!/compare/1526428800/1526515200

Low outlier.

https://backpack.tf/item/3578711306

Sale 3) Sold for 140 Keys

https://backpack.tf/profiles/76561198055847835#!/compare/1526428800/1526515200

Low outlier.

Sale 4) Sold for $319.99 (Keys were ~$1.97)

https://marketplace.tf/items/315;5;u10

319.99 / 1.97 = 162.43, which rounds to 162 Keys

https://backpack.tf/item/203250816

Sale 5) Sold for 170 Keys

https://backpack.tf/profiles/76561198012504506#!/compare/1526601600/1526688000

https://backpack.tf/profiles/76561198010742559#!/compare/1526601600/1526688000

https://imgur.com/a/Z8YWdDr - Credits to Sniffer [HAX]

https://backpack.tf/item/275093899

Sale 6) Sold for a Sunbeams Modest Metal Pile of Scrap + 42 Keys

https://backpack.tf/profiles/76561198069561283#!/compare/1520553600/1520640000

There's no Mini for the Modest.

Sale 7) Sold for a Burning Flames Dr's Dapper Topper + ~9 Keys of Items + 2 Keys

https://backpack.tf/profiles/76561198094964657#!/compare/1521417600/1521504000

High outlier.