Sale 1:

https://backpack.tf/profiles/76561198442764620#!/compare/1531958400/1532044800

https://backpack.tf/profiles/76561198047154265#!/compare/1531958400/1532044800

Sold for TFL Deep Cover + MS Rancho(14) + ~2 keys in pure

Deep Cover Mini:

https://backpack.tf/suggestion/5b65bebecf6c752fbb6523e6

Suggestion for 32 keys

Total is 48 keys

Sale 2:

https://backpack.tf/profiles/76561198060092058#!/compare/1528675200/1531267200

https://backpack.tf/profiles/76561198006102415#!/compare/1531180800/1531267200

Sold for 32 keys

Sale 3:

https://backpack.tf/profiles/76561198202694983#!/compare/1532736000/1532822400

https://backpack.tf/profiles/76561198125791160#!/compare/1532736000/1532822400

Sold for 40 keys

Sale 4:

https://backpack.tf/profiles/76561198282372085#!/compare/1532822400/1532908800

Bulk.

Sale 5:

https://backpack.tf/profiles/76561198215898179#!/compare/1532908800/1533081600

https://backpack.tf/profiles/76561198068986721#!/compare/1532995200/1533081600

Sold with OF Cranial for CH Greased

Might be better used there.

Sale 6:

https://marketplace.tf/items/338;5;u13

Sold for 66.07 USD

Keys at 1.97 USD

Total is 33.54 keys

https://i.imgur.com/qNyAsBg.png

Buyers up to 40 keys

Unsold for close to a month at 51 keys

https://backpack.tf/item/271505600

https://backpack.tf/item/6902321353

Lets go with 48 keys flat.