Sale 1:

https://backpack.tf/profiles/76561198067741687#!/compare/1532044800/1532131200

https://backpack.tf/profiles/76561198125248006#!/compare/1532044800/1532131200

Sold for 10 keys

Sale 2:

https://backpack.tf/profiles/76561198311498888#!/compare/1535760000/1535846400

https://backpack.tf/profiles/76561198128000627#!/compare/1535155200/1535846400

Can only trace 4 keys

Sale 3:

https://backpack.tf/profiles/76561198128838220#!/compare/1531872000/1531958400

Sold for 9 keys

Sale 4:

https://backpack.tf/profiles/76561198385940902#!/compare/1532822400/1532908800

https://backpack.tf/profiles/76561198265973023#!/compare/1532304000/1532908800

ID Match 21 keys, prob bulk buy

Sale 5:

https://backpack.tf/profiles/76561198265973023#!/compare/1533945600/1534032000

https://backpack.tf/profiles/76561198381463568#!/compare/1533945600/1534032000

Sold for Planets Engy Cap(12) + negligible sweets

Sale 6:

https://backpack.tf/profiles/76561198381463568#!/compare/1533945600/1534032000

https://backpack.tf/profiles/76561198074127950#!/compare/1533945600/1534032000

Sold for Planets Elfin(8.75)

Sale 7:

https://backpack.tf/profiles/76561198074127950#!/compare/1534032000/1534118400

https://backpack.tf/profiles/76561198069493147#!/compare/1534032000/1534118400

Bulk.

Sale 8:

https://backpack.tf/profiles/76561198069493147#!/compare/1534118400/1534204800

https://backpack.tf/profiles/76561198098880809#!/compare/1533945600/1534204800

Sold for ~9 keys in sweets (counting sniper rifle as 8)

Sale 9:

https://backpack.tf/profiles/76561198098880809#!/compare/1534636800/1535587200

https://backpack.tf/profiles/76561198128953533#!/compare/1534550400/1534636800

Untraceable.

Sale 10:

https://backpack.tf/profiles/76561198128953533#!/compare/1534896000/1534982400

https://backpack.tf/profiles/76561198173891483#!/compare/1534809600/1534982400

Sold for 10 keys + ~1 key in sweets

Total is 11 keys

Sale 11:

https://backpack.tf/profiles/76561198173891483#!/compare/1535414400/1535500800

https://backpack.tf/profiles/76561197999873164#!/compare/1535328000/1535414400

QS?

Total sales @:

8.75, 9, 9, 10, 11 keys

Taking 9 - 11 keys.