Sale 1:

https://backpack.tf/profiles/76561198050518375#!/compare/1567382400/1567468800

https://backpack.tf/profiles/76561198084179613#!/compare/1567382400/1567468800

Sold for ~6.5 keys

Sale 2:

https://backpack.tf/profiles/76561198084179613#!/compare/1567468800/1567555200

https://backpack.tf/profiles/76561198177838739#!/compare/1567468800/1567555200

Sold for ~6 keys in sweets

Sale 3:

https://backpack.tf/profiles/76561198177838739#!/compare/1567814400/1568073600

https://backpack.tf/profiles/76561198105659637#!/compare/1567987200/1568073600

Sold for 9 keys

Sale 4:

https://backpack.tf/profiles/76561198105659637#!/compare/1567987200/1568073600

https://backpack.tf/profiles/76561198080669489#!/compare/1567987200/1568073600

Uncertain (bot)

Sale 5:

https://backpack.tf/profiles/76561198314124641#!/compare/1566000000/1566086400

https://backpack.tf/profiles/76561198116559834#!/compare/1566000000/1566086400

Untrace

Sale 6:

https://backpack.tf/profiles/76561198116559834#!/compare/1566000000/1566086400

https://backpack.tf/profiles/76561198877975149#!/compare/1566000000/1566086400

bulky

Sale 7:

https://backpack.tf/profiles/76561198877975149#!/compare/1566172800/1566345600

https://backpack.tf/profiles/76561198207606539#!/compare/1566172800/1566259200

Can trace ~4 keys in sweets

Sale 8:

https://backpack.tf/profiles/76561198207606539#!/compare/1566172800/1566259200

https://backpack.tf/profiles/76561198087476001#!/compare/1566172800/1566259200

Sold for 6 keys

sale 9:

https://backpack.tf/profiles/76561198087476001#!/compare/1566345600/1566432000

https://backpack.tf/profiles/76561198405682760#!/compare/1566345600/1566432000

Sold for 6 keys

sale 10:

https://backpack.tf/profiles/76561198405682760#!/compare/1566432000/1566518400

https://backpack.tf/profiles/76561198975274446#!/compare/1566345600/1566432000

Untrace

Sale 11:

https://backpack.tf/profiles/76561198975274446#!/compare/1566604800/1566777600

https://backpack.tf/profiles/76561198315201234#!/compare/1566518400/1566691200

Sold with negligible sweets for Blizzardy HWAH

HWAH Mini:

https://backpack.tf/suggestion/5dc9156cd381720ab95cf355

Suggestion for 8.5 keys

Total is ~8 keys

Sale 12:

https://backpack.tf/profiles/76561198237844864#!/compare/1568160000/1568332800

https://backpack.tf/profiles/76561197995376241#!/compare/1568160000/1568332800

Untrace

Sale 13:

https://backpack.tf/profiles/76561198114782270#!/compare/1571875200/1571961600

https://backpack.tf/profiles/76561198133868529#!/compare/1571875200/1571961600'

https://backpack.tf/profiles/76561198046078762#!/compare/1571875200/1571961600

https://backpack.tf/profiles/76561198964562360#!/compare/1571961600/1571961600

https://backpack.tf/profiles/76561198333186334#!/compare/1572048000/1572134400

https://backpack.tf/profiles/76561198337734785#!/compare/1572048000/1572134400

Untrace / QS

sale 14:

https://backpack.tf/profiles/76561198210225228#!/compare/1566086400/1566172800

https://backpack.tf/profiles/76561198981607614#!/compare/1569542400/1569715200

Untrace

sale 15:

https://backpack.tf/profiles/76561198053488503#!/compare/1569801600/1569888000

https://backpack.tf/profiles/76561198313362742#!/compare/1569801600/1569888000

Sold for ~6 keys

Sale 16:

https://backpack.tf/profiles/76561198313362742#!/compare/1573171200/1573257600

https://backpack.tf/profiles/76561198077625769#!/compare/1573084800/1573257600

https://backpack.tf/profiles/76561198313362742#!/compare/1573171200/1573257600

tradeback

sale 17 - 19:

https://marketplace.tf/items/tf2/249;5;u59

$23.47 / $1.84 = 12.76 keys <--- https://backpack.tf/item/2473054995

$10 / $1.79 = 5.59 keys

$13.33 / $1.80 = 7.41 keys

Total sales @:

5.59, 6, 6, 6, 6, 6.5, 7.41, 8, 9, 12.76 keys

buyers up to 6 keys,

seller at 8 keys is knew,

seller for ~8.5 is potentially unsold for quite some time,

given bulk of sales at 6,

calling 5.59 low,

9 + high,

taking 6 - 8 keys.