The Icon

https://backpack.tf/item/5414822805

Sale 1) Sold for 8 Keys + ~0.5 Keys of Items

https://backpack.tf/profiles/76561198141109490#!/compare/1521072000/1521849600

8 + 0.5 = 8.5 Keys

https://backpack.tf/item/5762857641

Sale 2) Sold for 10 Keys

https://backpack.tf/profiles/76561198053747026#!/compare/1523750400/1523836800

Sale 3) Sold for an Orbiting Fire Hetman's Headpiece (9.3 Keys)

https://backpack.tf/profiles/76561198799183693#!/compare/1524268800/1524528000

Rounds to 9.5 Keys

Hetman's Mini

https://imgur.com/a/X490sbS - 2 Sellers at 9.3 Keys (2 Days and 7 Days)

https://backpack.tf/item/794492930

https://backpack.tf/item/825351533

Sale 4) Sold for 8 Keys + 8 Refined

https://backpack.tf/profiles/76561198164372490#!/compare/1524441600/1524528000

Rounds to 8.5 Keys

Sale 5) Sold for $22 when Keys were ~$1.99 each

https://marketplace.tf/items/30836;5;u11

22 / 1.99 = 11.06, which rounds to 11 Keys.

Using the Unsolds at 9.7 Keys to say 11 Keys is high: https://imgur.com/a/bCt8S2h (11 Days and 20 Days)

https://backpack.tf/item/5414822805

https://backpack.tf/item/5762857641