Sale 1:

https://backpack.tf/profiles/76561198254861074#!/compare/1536019200/1536105600

https://backpack.tf/profiles/76561198147857818#!/compare/1536019200/1536278400

ALT

Sale 2:

https://backpack.tf/profiles/76561198154273000#!/compare/1531094400/1531267200

https://backpack.tf/profiles/76561198254861074#!/compare/1530921600/1531267200

Sold with ~5 keys in sweets for Neutron Nasty(23)

Total is 18 keys

Sale 3:

https://backpack.tf/profiles/76561198059301340#!/compare/1531785600/1531872000

https://backpack.tf/profiles/76561198055622215#!/compare/1531699200/1531872000

Bulk.

Sale 4:

https://backpack.tf/profiles/76561198055622215#!/compare/1533513600/1533600000

https://backpack.tf/profiles/76561198847680167#!/compare/1533513600/1533600000

Bulk.

Sale 5:

https://backpack.tf/profiles/76561198135388328#!/compare/1533772800/1533859200

https://backpack.tf/profiles/76561198397303666#!/compare/1533168000/1535587200

Sold for 18 keys (ID Match)

Sale 6:

https://backpack.tf/profiles/76561198309832044#!/compare/1531094400/1531180800

https://backpack.tf/profiles/76561198133965614#!/compare/1531008000/1531180800

11 keys + negligible sweets

Sale 7:

https://backpack.tf/profiles/76561198133965614#!/compare/1531180800/1531353600

https://backpack.tf/profiles/76561198165055074#!/compare/1531180800/1531267200

Sold for Smoking Eyewear(14)

Sale 8:

https://backpack.tf/profiles/76561198165055074#!/compare/1531699200/1531785600

https://backpack.tf/profiles/76561198262354524#!/compare/1531699200/1531785600

Bulk.

Sale 9:

https://backpack.tf/profiles/76561198262354524#!/compare/1533254400/1533340800

https://backpack.tf/profiles/76561198104064829#!/compare/1533254400/1533340800

Bulk.

Sale 10:

https://backpack.tf/profiles/76561198104064829#!/compare/1533427200/1533513600

https://backpack.tf/profiles/76561198045964562#!/compare/1533340800/1533513600

Sold for Searing Protector

Use there.

Sale 11:

https://backpack.tf/profiles/76561198045964562#!/compare/1533859200/1533945600

https://backpack.tf/profiles/76561198049999947#!/compare/1533772800/1533945600

Sold for 15 keys + ~3 keys in sweets

Total is 18 keys

Sale 12:

https://backpack.tf/profiles/76561198049999947#!/compare/1535414400/1535500800

https://backpack.tf/profiles/76561198076050780#!/compare/1535068800/1535500800

Can only trace a key

Sale 13:

https://backpack.tf/profiles/76561198076050780#!/compare/1535068800/1535500800

https://backpack.tf/profiles/76561198044468624#!/compare/1535328000/1535500800

Sold for P Fetti Tossle(22)

Sale 14:

https://backpack.tf/profiles/76561198044468624#!/compare/1535587200/1536019200

https://backpack.tf/profiles/76561198115631482#!/compare/1536019200/1536192000

Sold for C9 Berliner

Use there.

Total sales @:

11, 14, 18, 18, 18, 22 keys

Buyers up to 14 keys,

Taking 18 - 22 keys.