Sale 1:

https://backpack.tf/profiles/76561198048486969#!/compare/1592265600/1592352000

https://backpack.tf/profiles/76561198420421019#!/compare/1592265600/1594425600

Sold with negligible sweets for G Fetti Pillar(13)

sale 2:

https://backpack.tf/profiles/76561198420421019#!/compare/1592265600/1592352000

https://backpack.tf/profiles/76561198002757046#!/compare/1592265600/1592352000

Sold with 1 key for Smoking Pillar(12)

Total is 11 keys

sale 3:

https://backpack.tf/profiles/76561198124723591#!/compare/1596240000/1596153600

https://backpack.tf/profiles/76561198088063575#!/compare/1594684800/1596240000

Scammer

sale 4:

https://backpack.tf/profiles/76561198079416358#!/compare/1592092800/1592179200

https://backpack.tf/profiles/76561198279706201#!/compare/1592092800/1592179200

Bulk

sale 5:

https://backpack.tf/profiles/76561198279706201#!/compare/1592265600/1592352000

https://backpack.tf/profiles/76561198295318668#!/compare/1592092800/1592352000

Sold with ~1 key in sweets for ~8 keys in sweets

Total is 7 keys

sale 6:

https://backpack.tf/profiles/76561198295318668#!/compare/1592352000/1593302400

https://backpack.tf/profiles/76561198985910282#!/compare/1592265600/1592352000

QS

sale 7:

https://backpack.tf/profiles/76561198985910282#!/compare/1594684800/1594771200

https://backpack.tf/profiles/76561198048851745#!/compare/1593907200/1595376000

sold for ~7 keys then QS....

sale 8:

https://marketplace.tf/items/tf2/314;5;u32

$14 / $1.92 = 7.29 keys

Total sales @:

7, 7.5, 11, 13 keys

https://bot.tf/stats/listings/MXXVPPJ1

seller for 9 unsold for months,

given 13 resold for lower,

taking 7 - 7.5 keys