Sale 1:

https://backpack.tf/profiles/76561198157207366#!/compare/1534896000/1534982400

Bulk

Sale 2:

https://backpack.tf/profiles/76561197977853499#!/compare/1534982400/1535068800

Sold for spells?

Sale 3:

https://backpack.tf/profiles/76561197977853499#!/compare/1535068800/1535155200

https://backpack.tf/profiles/76561198120467518#!/compare/1535068800/1535155200

Bulk.

Sale 4:

https://backpack.tf/profiles/76561198008113369#!/compare/1533340800/1533427200

https://backpack.tf/profiles/76561198437172792#!/compare/1533340800/1533427200

Bulk.

Sale 5:

https://backpack.tf/profiles/76561198437172792#!/compare/1534291200/1534377600

https://backpack.tf/profiles/76561198134512931#!/compare/1534291200/1534377600

Sold with Smoking Headsplitter for Burning Whoopee Cap(64)

Headsplitter Mini:

https://backpack.tf/suggestion/5b900df744325a5115260946

Suggestion for 18 keys.

Total is 46 keys

Sale 6:

https://backpack.tf/profiles/76561198039731024#!/compare/1534896000/1534982400

Untrace.

Sale 7:

https://backpack.tf/profiles/76561198192118853#!/compare/1532217600/1532304000

https://backpack.tf/profiles/76561198142994553#!/compare/1532217600/1532304000

https://backpack.tf/profiles/76561198218497692#!/compare/1532217600/1532304000

Untrace.

Sale 8:

https://backpack.tf/profiles/76561198037248506#!/compare/1532217600/1532304000

Bulk.

Sale 9:

https://backpack.tf/profiles/76561198437172792#!/compare/1533513600/1533600000

https://backpack.tf/profiles/76561198091133177#!/compare/1533081600/1533513600

Bulk.

Sale 10:

https://backpack.tf/profiles/76561198091133177#!/compare/1533513600/1533600000

https://backpack.tf/profiles/76561197994697258#!/compare/1533427200/1533513600

Sold with sweets for P Fetti Hunter(30)

Low.

Only usable sale at 46 keys.

https://i.imgur.com/jMWOpPM.jpg

Seller at 44, unsold for nearly a month.

Going with 44 - 46 keys (Thx FishCrimes)