In the name of the Rock, the Paper, and the holy Scissors

Sale 1:

https://backpack.tf/profiles/76561198335791307#!/compare/1544313600/1544400000

https://backpack.tf/profiles/76561198067287975#!/compare/1544313600/1544400000

Keys

Sale 2:

https://backpack.tf/profiles/76561198137132859#!/compare/1546905600/1547596800

https://backpack.tf/profiles/76561198121385547#!/compare/1547424000/1547596800

Sold for ~9.5 keys

Sale 3:

https://backpack.tf/profiles/76561198097271466#!/compare/1546041600/1546128000

https://backpack.tf/profiles/76561198142055566#!/compare/1546041600/1546128000

Bulky

Sale 4:

https://backpack.tf/profiles/76561198037772474#!/compare/1549670400/1549929600

https://backpack.tf/profiles/76561198838870134#!/compare/1549584000/1550361600

Untrace

Sale 5:

https://backpack.tf/profiles/76561198838870134#!/compare/1550361600/1550448000

https://backpack.tf/profiles/76561198037674114#!/compare/1550448000/1550534400

https://backpack.tf/profiles/76561198002757046#!/compare/1550448000/1550534400

Untrace / QS

Sale 6:

https://backpack.tf/profiles/76561198002757046#!/compare/1551052800/1551139200

https://backpack.tf/profiles/76561198042823991#!/compare/1551052800/1551225600

Sold for 10 keys

Sale 7:

https://backpack.tf/profiles/76561198121898011#!/compare/1550102400/1550188800

https://backpack.tf/profiles/76561198096802308#!/compare/1550016000/1550188800

Bulk

Sale 8:

https://backpack.tf/profiles/76561198096802308#!/compare/1551398400/1551484800

QS

Sale 9:

https://backpack.tf/profiles/76561198108943947#!/compare/1544572800/1544832000

Became unusual here

Sale 10:

https://backpack.tf/profiles/76561198046840320#!/compare/1545868800/1546473600

https://backpack.tf/profiles/76561198128999327#!/compare/1546387200/1546560000

Keys

Sale 11:

https://backpack.tf/profiles/76561198128999327#!/compare/1548720000/1549929600

https://backpack.tf/profiles/76561198345464796#!/compare/1548633600/1550188800

Untrace

Sale 12:

https://backpack.tf/profiles/76561198174116473#!/compare/1545004800/1545609600

https://backpack.tf/profiles/76561198043924535#!/compare/1543017600/1545436800

Became unusual

Sale 13:

https://backpack.tf/profiles/76561198312583107#!/compare/1546992000/1547078400

https://backpack.tf/profiles/76561198362798112#!/compare/1547424000/1547856000

Untrace

Sale 14:

https://backpack.tf/profiles/76561198067853901#!/compare/1544918400/1545091200

https://backpack.tf/profiles/76561198057725524#!/compare/1545004800/1545091200

Sold for 10 keys

Sale 15:

https://backpack.tf/profiles/76561198057725524#!/compare/1550275200/1550361600

https://backpack.tf/profiles/76561198160856661#!/compare/1550275200/1550361600

Bulk

Sale 16:

https://backpack.tf/profiles/76561198364730989#!/compare/1547164800/1548979200

Untrace

Sale 17:

https://backpack.tf/profiles/76561198364730989#!/compare/1548979200/1549238400

https://backpack.tf/profiles/76561198328984748#!/compare/1548892800/1549238400

SCM

Sale 18:

https://backpack.tf/profiles/76561197993655338#!/compare/1547078400/1547942400

SCM

Sale 19:

https://backpack.tf/profiles/76561198363395191#!/compare/1543795200/1544140800

https://backpack.tf/profiles/76561198040421130#!/compare/1510963200/1550448000

Untrace

Sale 20:

https://backpack.tf/profiles/76561198354549308#!/compare/1548892800/1549497600

https://backpack.tf/profiles/76561198431135206#!/compare/1549065600/1549152000

High

Sale 21:

https://backpack.tf/profiles/76561198061440669#!/compare/1545868800/1545955200

https://backpack.tf/profiles/76561198045447325#!/compare/1545955200/1546041600

Sold for 9 keys

Sale 22:

https://backpack.tf/profiles/76561198283051944#!/compare/1549238400/1549324800

Sold for ~9.5 keys

Sale 23:

https://backpack.tf/profiles/76561198024867201#!/compare/1547337600/1547424000

https://backpack.tf/profiles/76561198115928144#!/compare/1547337600/1547424000

Sold for 11 keys

Sale 24:

https://backpack.tf/profiles/76561198115928144#!/compare/1547424000/1547510400

https://backpack.tf/profiles/76561198113899098#!/compare/1547424000/1547510400

Untrace

Sale 25:

https://backpack.tf/profiles/76561198113899098#!/compare/1550275200/1550361600

https://backpack.tf/profiles/76561198122070125#!/compare/1550620800/1551052800

SCM

Sale 26 - 28:

https://marketplace.tf/items/1110;5;u3003

$21.99 / $1.64 = 13.41 keys

$17.22 / $1.76 = 9.78 keys

$24.99 / $1.78 = 14.04 keys

Total sales @:

9, 9.5, 9.5, 9.78, 10, 10, 11, 13.41, 14.04 keys

Sellers down to 10 keys,

Buyers up to 9.5 keys,

going with 10 flat.