Ice Climbers

https://backpack.tf/item/3425549988

Sale 1) ?

https://backpack.tf/profiles/76561198268152914#!/compare/1533600000/1533686400

Sale 2) Bulk

https://backpack.tf/profiles/76561198112336424#!/compare/1534896000/1534982400

https://backpack.tf/item/3276056215

Sale 3) Sold for 30 Keys

https://backpack.tf/profiles/76561198122995945#!/compare/1529280000/1529366400

Sale 4) Bulk sale

https://backpack.tf/profiles/76561198253093948#!/compare/1530748800/1530835200

Sale 5) Sold for 35 Keys

https://backpack.tf/profiles/76561198065733542#!/compare/1532131200/1532217600

Sale 6) Sold for a Purple Energy Puffy Polar Cap (26 Keys)

https://backpack.tf/profiles/76561198825748033#!/compare/1532304000/1532476800

Sale 7) Sold for a Flaming Lantern Defiant Spartan + 5 Keys

https://backpack.tf/profiles/76561198153088409#!/compare/1532995200/1533081600

http://www.tf2outpost.com/trade/29721978 - Buyout of 35 Keys

Sale 8) Sold + 3 Keys for a Purple Energy Polar Puffy Cap (26 Keys)

https://backpack.tf/profiles/76561198448408003#!/compare/1533168000/1533254400

https://backpack.tf/profiles/76561198003926663#!/compare/1533168000/1533254400

Sale 9) Sold for 17 Keys?

https://backpack.tf/profiles/76561198003926663#!/compare/1533340800/1533427200

Low outlier.

Sale 10) ?

https://backpack.tf/profiles/76561198305676157#!/compare/1533427200/1533513600

https://backpack.tf/profiles/76561198073176682#!/compare/1533600000/1533859200

Since 26 Keys is close to the Buyers at 24 Keys, I'll count it as a low outlier but supportive of a drop.