Sale 1:

https://backpack.tf/profiles/76561198349886701#!/compare/1564099200/1564272000

https://backpack.tf/profiles/76561198021055079#!/compare/1564185600/1564272000

Bulk QS

sale 2:

https://backpack.tf/profiles/76561198021055079#!/compare/1566864000/1566950400

https://backpack.tf/profiles/76561198939522547#!/compare/1566950400/1567036800

Sold for Flies Stahl(20) + 2 keys

Total is 22 keys

https://bot.tf/stats/listings/4W617ZV7

B/O of 12 keys, capping

Sale 3:

https://backpack.tf/profiles/76561198057389121#!/compare/1566086400/1569456000

https://backpack.tf/profiles/76561198121906737#!/compare/1532390400/1567555200

SCM

Sale 4:

https://backpack.tf/profiles/76561198093561406#!/compare/1569369600/1569456000

https://backpack.tf/profiles/76561198031126990#!/compare/1569369600/1569456000

Bulk

Sale 5:

https://backpack.tf/profiles/76561198031126990#!/compare/1569628800/1569715200

https://backpack.tf/profiles/76561198067994903#!/compare/1569628800/1569715200

Bulk

Sale 6:

https://backpack.tf/profiles/76561198067994903#!/compare/1569715200/1569974400

https://backpack.tf/profiles/76561198162683908#!/compare/1569888000/1569974400

Bulk

Sale 7:

https://backpack.tf/profiles/76561198010406999#!/compare/1565308800/1565395200

https://backpack.tf/profiles/76561198817510262#!/compare/1565136000/1565308800

Sold for ~8.5 keys (QS)

Sale 8:

https://backpack.tf/profiles/76561198817510262#!/compare/1565308800/1565395200

https://backpack.tf/profiles/76561197999618931#!/compare/1565222400/1567036800

Untrace

Sale 9:

https://backpack.tf/profiles/76561198337734785#!/compare/1563494400/1563580800

https://backpack.tf/profiles/76561198137796415#!/compare/1563494400/1563580800

https://backpack.tf/profiles/76561198137796415#!/compare/1563580800/1563667200

https://backpack.tf/profiles/76561198337734785#!/compare/1563580800/1563667200

Tradeback

Sale 10:

https://backpack.tf/profiles/76561198337734785#!/compare/1564531200/1564617600

https://backpack.tf/profiles/76561198158469471#!/compare/1562716800/1564617600

Sold for 12 keys

Sale 11:

https://backpack.tf/profiles/76561198158469471#!/compare/1569369600/1569715200

https://backpack.tf/profiles/76561198298473489#!/compare/1569283200/1569369600

Sold for ~8.5 keys

Sale 12:

https://backpack.tf/profiles/76561198298473489#!/compare/1569369600/1569456000

https://backpack.tf/profiles/76561198056571743#!/compare/1567987200/1569801600

Sold for 9 keys

Sale 13:

https://backpack.tf/profiles/76561198021055079#!/compare/1563580800/1563667200

https://backpack.tf/profiles/76561198971458572#!/compare/1563667200/1564012800

Sold for 14 keys

Sale 14:

https://backpack.tf/profiles/76561198363248386#!/compare/1568678400/1568851200

https://backpack.tf/profiles/76561198164364636#!/compare/1568764800/1568851200

Sold for 9 keys

Sale 15:

https://backpack.tf/profiles/76561198164364636#!/compare/1568764800/1568851200

https://backpack.tf/profiles/76561198337734785#!/compare/1568764800/1568851200

Bulk QS?

Sale 16:

https://backpack.tf/profiles/76561198337734785#!/compare/1568937600/1569024000

https://backpack.tf/profiles/76561198141470240#!/compare/1568851200/1568937600

Keys...

Sale 17:

https://backpack.tf/profiles/76561198141470240#!/compare/1569024000/1569110400

https://backpack.tf/profiles/76561198840944658#!/compare/1568937600/1569110400

Untrace

Sale 18 - 20:

https://marketplace.tf/items/tf2/303;5;u30

$24.99 / $1.83 = 13.66 keys

$22.4 / $1.81 = 12.38 keys <-- https://backpack.tf/item/6216412254

$11 / $1.81 = 6.08 keys

Total sales @:

6.08, 8.5, 9, 9, 12, 12, 12.38, 13.66, 14 keys

Buyers up to ~7.5 keys,

new seller for 13 keys,

gonna call 8.5 low,

taking 9 - 14 keys.