Sale 1: Untrace.

https://backpack.tf/profiles/76561197960958019#!/compare/1555632000/1555718400

https://backpack.tf/profiles/76561198165205268#!/compare/1555632000/1555718400

Sale 2: QS.

https://backpack.tf/profiles/76561198165205268#!/compare/1555632000/1555718400

https://backpack.tf/profiles/76561198859721638#!/compare/1555632000/1555718400

Sale 3: ~72 Keys.

Sold For Cloud 9 Dark Falkirk Helm (32) + 40 Keys = 72 keys.

https://backpack.tf/profiles/76561198859721638#!/compare/1555632000/1555718400

https://backpack.tf/profiles/76561198310972287#!/compare/1555632000/1555718400

Cloud 9 Dark Falkirk Helm's Mini:

https://backpack.tf/suggestion/5d28c867d381726c8d4ac4a8

Sale 4: Use There.

Sold For Kill-a-Watt Hungover Hero.

https://backpack.tf/profiles/76561198310972287#!/compare/1556323200/1556409600

https://backpack.tf/profiles/76561198859721638#!/compare/1556323200/1556409600

Sale 5: ~74 Keys.

Sold For Ancient Codex Captain Space Mann (69) + 5 Keys = 74 Keys.

https://backpack.tf/profiles/76561198859721638#!/compare/1556323200/1556409600

https://backpack.tf/profiles/76561198354979270#!/compare/1556323200/1556409600

Ancient Codex Captain Space Mann's Mini:

https://backpack.tf/suggestion/5d28b71767807241f80e0d39

Trade Back:

https://backpack.tf/profiles/76561198354979270#!/compare/1556409600/1556496000

https://backpack.tf/profiles/76561198846276257#!/compare/1556409600/1556496000

Sale 6: Use There.

Sold For Circling Heart Dayjogger + 18 Keys.

https://backpack.tf/profiles/76561198354979270#!/compare/1557360000/1557446400

https://backpack.tf/profiles/76561198150729025#!/compare/1557360000/1557446400

Sale 7: Use There.

Sold For Sunbeams Honcho's Headgear.

https://backpack.tf/profiles/76561198150729025#!/compare/1560124800/1560211200

https://backpack.tf/profiles/76561198136866711#!/compare/1560211200/1560384000

Sales: 72/74

Going with 72-74 keys.

Thanks to scourge for the premium!