Burst into the light.

https://backpack.tf/item/4311100942

Sale 1) Sold for 8 Keys + 12 Refined

https://backpack.tf/profiles/76561198335791307#!/compare/1553904000/1553990400

https://backpack.tf/profiles/76561198416282143#!/compare/1553904000/1553990400

https://imgur.com/a/UQB1S4U

Rounds to 8 Keys

https://backpack.tf/item/5102955953

Sale 2) ?

https://backpack.tf/profiles/76561198252123826#!/compare/1553990400/1555200000

Sale 3) Sold for 6 Keys + 24 Refined

https://backpack.tf/profiles/76561198062425416#!/compare/1554681600/1554768000

Rounds to 6.5 Keys

https://backpack.tf/item/5476132905

Sale 4) ?

https://backpack.tf/profiles/76561198335791307#!/compare/1556582400/1556668800

https://backpack.tf/profiles/76561198166649901#!/compare/1556496000/1556668800

https://backpack.tf/item/6356923038

Sale 5) ?

https://backpack.tf/profiles/76561197972383519#!/compare/1554508800/1554595200

https://backpack.tf/profiles/76561198125985288#!/compare/1554163200/1556496000

https://backpack.tf/item/6345616281

Sale 6) ?

https://backpack.tf/profiles/76561198096766558#!/compare/1553212800/1553644800

https://backpack.tf/item/6303992280

Sale 7) ?

https://backpack.tf/profiles/76561198882398111#!/compare/1554768000/1554940800

https://backpack.tf/profiles/76561198824690088#!/compare/1554768000/1554854400

Sale 8) ?

https://backpack.tf/profiles/76561198824690088#!/compare/1554768000/1554854400

https://backpack.tf/profiles/76561198090147535#!/compare/1554768000/1554854400

https://backpack.tf/item/4397232153

Sale 9) ?

https://backpack.tf/profiles/76561198305676157#!/compare/1552608000/1552694400

https://backpack.tf/profiles/76561198867586688#!/compare/1552694400/1552780800

Sale 10) SCM sale

https://backpack.tf/profiles/76561198867586688#!/compare/1553385600/1553731200

https://backpack.tf/profiles/76561198130017335#!/compare/1553817600/1554595200

Sale 11) Sold for 7 Keys

https://backpack.tf/profiles/76561198130017335#!/compare/1555113600/1555200000

https://backpack.tf/profiles/76561198196221459#!/compare/1555113600/1557014400

https://backpack.tf/item/4564678598

Sale 12) Sold for 7 Keys

https://backpack.tf/profiles/76561198316571500#!/compare/1552089600/1552176000

Sale 13) Quicksold for 6 Keys

https://backpack.tf/profiles/76561198174632014#!/compare/1552521600/1552608000

Sale 14) ?

https://backpack.tf/profiles/76561198095189063#!/compare/1555027200/1555286400

https://backpack.tf/profiles/76561198063152319#!/compare/1546819200/1555372800

https://backpack.tf/item/7107195400

Sale 15) Sold for 6 Keys + 24 Refined

https://backpack.tf/profiles/76561198059301340#!/compare/1552867200/1552953600

Rounds to 6.5 Keys

Sale 16) Sold for 8 Keys

https://backpack.tf/profiles/76561198305676157#!/compare/1554336000/1554422400

Sale 17) ?

https://backpack.tf/profiles/76561198302451811#!/compare/1554854400/1554940800

https://backpack.tf/profiles/76561198165205268#!/compare/1554854400/1554940800

Sale 18) Quicksold for 6 Keys

https://backpack.tf/profiles/76561198165205268#!/compare/1554854400/1554940800

https://backpack.tf/profiles/76561198286512839#!/compare/1554854400/1554940800

https://marketplace.tf/items/30621;5;u3003 - Marketplace sales are either ~5.6 Keys or >8.25 Keys.

https://imgur.com/a/Vg2NsG4 - Sellers at 7 Keys (5 Hours), 7.94 Keys (19 Hours), 8 Keys (1 Month), and 8 Keys (6 Days). Buyer at 6.32 Keys.

https://backpack.tf/item/4732526107

https://backpack.tf/item/5102955953

https://backpack.tf/item/5632700020

https://backpack.tf/item/5476644403

https://backpack.tf/u/76561198097271466

8 will probably end up being too high, but 2 pure sales within the past 2 months makes me think 8 is fine in the range for now.