Resuggestion, thanks to FishCrimes for the info!

Sale 1:

https://backpack.tf/profiles/76561198045775820#!/compare/1565913600/1566000000

https://backpack.tf/profiles/76561198334091691#!/compare/1566086400/1566172800

SCM

Sale 2:

https://backpack.tf/profiles/76561198341171690#!/compare/1563667200/1563753600

https://backpack.tf/profiles/76561198145743438#!/compare/1563321600/1563753600

Untrace

Sale 3:

https://backpack.tf/profiles/76561198145743438#!/compare/1563321600/1563753600

https://backpack.tf/profiles/76561198307602421#!/compare/1564012800/1564099200

SCM

Sale 4:

https://backpack.tf/profiles/76561198307602421#!/compare/1564704000/1564876800

https://backpack.tf/profiles/76561198048851745#!/compare/1564704000/1564790400

Sold for 7 keys

Sale 5:

https://backpack.tf/profiles/76561198023542389#!/compare/1563580800/1563840000

https://backpack.tf/profiles/76561198378810901#!/compare/1563580800/1563667200

Sold for Ancient HFOHA

HFOHA Mini:

https://backpack.tf/suggestion/5d80876ed381722a5d00c743

Suggestion for 7.5 keys

Sale 6:

https://backpack.tf/profiles/76561198378810901#!/compare/1563667200/1563753600

https://backpack.tf/profiles/76561198088817914#!/compare/1560211200/1563667200

Sold with ~0.5 keys in sweets for Planets Hedge(8)

Total is ~7.5 keys

Sale 7:

https://marketplace.tf/items/tf2/436;5;u36

$12 / $1.82 = 6.59 keys

Total sales @:

6.59, 7, 7.5, 7.5 keys

Buyers up to 6 keys,

seller at ~6.5 keys, unsold for week+,

Seller for 8 keys unsold for nearly a month,

taking 6.5 - 7.5 keys

linking previous suggestion:

https://backpack.tf/suggestion/5d8087766780727bf236a6bd