Sale 1:

https://backpack.tf/profiles/76561198168863803#!/compare/1546646400/1546732800

https://backpack.tf/profiles/76561198047831718#!/compare/1546646400/1546732800

Sold for 55 keys + Hot FT Haunted Scattergun

Scattergun Mini:

https://backpack.tf/profiles/76561198168863803#!/compare/1547078400/1547164800

https://backpack.tf/profiles/76561198114097410#!/compare/1547078400/1547164800

Sold for Miami Cold Killer + 3 keys

Killer Mini:

https://backpack.tf/suggestion/5c41576d44325a0b4607a487

Suggestion for 26 keys

Total is 29 keys

https://backpack.tf/profiles/76561198114097410#!/compare/1547164800/1547337600

https://backpack.tf/profiles/76561198065570956#!/compare/1546732800/1547510400

SCM

https://steamcommunity.com/market/listings/440/Unusual%20Haunted%20Ghosts%20Scattergun%20%28Field-Tested%29

Sold for 99.95 CAD

Keys at 3.13 CAD

Total is 31.93 keys

Lets take an average of 30.5 keys

Total is 85.5 keys

Sale 2:

https://backpack.tf/profiles/76561198047831718#!/compare/1547078400/1547164800

https://backpack.tf/profiles/76561198122604075#!/compare/1547078400/1547164800

Bulk

Sale 3:

https://backpack.tf/profiles/76561198122604075#!/compare/1547164800/1547251200

https://backpack.tf/profiles/76561198069980430#!/compare/1547164800/1547251200

Untrace

Sale 4:

https://backpack.tf/profiles/76561198069980430#!/compare/1547337600/1547424000

https://backpack.tf/profiles/76561198114402400#!/compare/1547337600/1547424000

Sold with 50 keys for Strange Scorching Pithy

Use there.

Sale 5:

https://backpack.tf/profiles/76561198114402400#!/compare/1547596800/1547683200

https://backpack.tf/profiles/76561198091786731#!/compare/1547683200/1547769600

Sold for 80 keys

Sale 6:

https://marketplace.tf/items/30646;5;u98;strange

Sold for 109.98 USD

Keys at 1.77 USD

Total is 62.14 keys

Total sales @:

62.14, 80, 85.5 keys

Taking 80 - 86 keys

Leaving out 62 due to buyers of non strange version.