Resuggestion thanks to Shuffle for the info!

Sale 1:

https://backpack.tf/profiles/76561198315588518#!/compare/1564012800/1564185600

https://backpack.tf/profiles/76561198021272428#!/compare/1564099200/1564185600

Transfer

Sale 2:

https://backpack.tf/profiles/76561198019257028#!/compare/1560816000/1560902400

https://backpack.tf/profiles/76561198063948486#!/compare/1560816000/1560902400

Bulk

Sale 3:

https://backpack.tf/profiles/76561198063948486#!/compare/1560902400/1561507200

https://backpack.tf/profiles/76561198337734785#!/compare/1560816000/1560902400

Sold for ~7 keys

https://imgur.com/a/AmFuKyo

Sale 4:

https://backpack.tf/profiles/76561198135183331#!/compare/1564099200/1564531200

https://backpack.tf/profiles/76561198323565601#!/compare/1565913600/1566000000

https://backpack.tf/profiles/76561198089253101#!/compare/1565913600/1566000000

untrace

Sale 5:

https://backpack.tf/profiles/76561198278663938#!/compare/1563667200/1563840000

https://backpack.tf/profiles/76561198096447036#!/compare/1563580800/1563667200

Bulk

Sale 6:

https://backpack.tf/profiles/76561198096447036#!/compare/1563753600/1563926400

https://backpack.tf/profiles/76561198337734785#!/compare/1563840000/1563926400

Sold for ~7 keys

Sale 7:

https://backpack.tf/profiles/76561198072555205#!/compare/1565913600/1566000000

https://backpack.tf/profiles/76561198025618418#!/compare/1565913600/1566086400

SCM

Sale 8:

https://backpack.tf/profiles/76561198186532535#!/compare/1566345600/1566432000

https://backpack.tf/profiles/76561198056086416#!/compare/1566345600/1566432000

Sold with ~1.5 keys in sweets for Aces Elfin(10)

Total is 8.5 keys

Sale 9:

https://backpack.tf/profiles/76561198056086416#!/compare/1566432000/1566518400

https://backpack.tf/profiles/76561198123580846#!/compare/1566432000/1566518400

QS for ~5 keys

Sale 10:

https://backpack.tf/profiles/76561198343654266#!/compare/1566172800/1566432000

https://backpack.tf/profiles/76561198382290208#!/compare/1566345600/1566432000

QS for ~5 keys

Sale 11:

https://backpack.tf/profiles/76561198091957564#!/compare/1566518400/1566691200

https://backpack.tf/profiles/76561197995376241#!/compare/1566432000/1566518400

Untrace

Sale 12:

https://backpack.tf/profiles/76561198014926453#!/compare/1565913600/1566000000

https://backpack.tf/profiles/76561198025618418#!/compare/1565913600/1566000000

SCM

Shuffle's Part:

Sale 3 isn't 6 Keys

https://imgur.com/a/AmFuKyo

Total Sales @:

5, 5, 7, 7, 8.5 keys

Buyers up to 5 keys,

sellers down to 8 keys,

taking 7 flat.