Sale 1:

https://backpack.tf/profiles/76561198272038643#!/compare/1578700800/1584316800

https://backpack.tf/profiles/76561198210115433#!/compare/1582848000/1584316800

Sold for 12 keys

sale 2:

https://backpack.tf/profiles/76561198095022965#!/compare/1580601600/1580688000

https://backpack.tf/profiles/76561198171258173#!/compare/1580342400/1580774400

Sold for DP Noir + 1 key

use there

sale 3:

https://backpack.tf/profiles/76561198171258173#!/compare/1582416000/1582502400

https://backpack.tf/profiles/76561198125791160#!/compare/1582416000/1582502400

sold with 4 keys for Insomnia Counterfeit

use there, few sales

Sale 4;

https://backpack.tf/profiles/76561198850274253#!/compare/1581552000/1581638400

https://backpack.tf/profiles/76561198048770504#!/compare/1581638400/1581811200

Sold for 10 keys

Sale 5:

https://backpack.tf/profiles/76561198048770504#!/compare/1582156800/1582329600

https://backpack.tf/profiles/76561198026462419#!/compare/1582329600/1582416000

untrace

sale 6:

https://backpack.tf/profiles/76561198065741916#!/compare/1583971200/1584835200

https://backpack.tf/profiles/76561198114410137#!/compare/1582848000/1583971200

Sold for keys, probably.

sale 7:

https://backpack.tf/profiles/76561198154023527#!/compare/1582848000/1582934400

https://backpack.tf/profiles/76561198151085180#!/compare/1582761600/1582848000

Can trace ~3 keys

sale 8:

https://backpack.tf/profiles/76561198151085180#!/compare/1583020800/1583107200

https://backpack.tf/profiles/76561198193671641#!/compare/1583020800/1583107200

Sold for TW Ketche

Ketche Mini:

https://backpack.tf/suggestion/5ea5f666be7749555e12b31d

suggestion for 7.25 keys

Sale 9:

https://backpack.tf/profiles/76561198193671641#!/compare/1583193600/1583366400

https://backpack.tf/profiles/76561198216793315#!/compare/1582761600/1583193600

Sold with 1 key for Smoking Noir

use there

sale 10:

https://backpack.tf/profiles/76561198216793315#!/compare/1583712000/1583884800

https://backpack.tf/profiles/76561198065904839#!/compare/1583107200/1583884800

Sold for 12 keys

sale 11:

https://backpack.tf/profiles/76561198065904839#!/compare/1583107200/1583884800

https://backpack.tf/profiles/76561198841279602#!/compare/1583798400/1583884800

QS after Sale 10 for ~8 keys

Sale 12:

https://marketplace.tf/items/tf2/319;5;u59

$17.5 / $1.68 = 10.42 keys

Total sales @:

7.25, 10, 10, 12, 12 keys

buyers up to ~8.5 keys,

sellers down to 13 keys,

taking 10 - 12 keys