Sale 1:

https://backpack.tf/profiles/76561198322560312#!/compare/1586131200/1586217600

https://backpack.tf/profiles/76561198966838493#!/compare/1585872000/1586131200

https://backpack.tf/profiles/76561198141477086#!/compare/1586044800/1586131200

https://backpack.tf/profiles/76561198176022675#!/compare/1586044800/1586131200

https://backpack.tf/profiles/76561199017926833#!/compare/1586131200/1586217600

https://backpack.tf/profiles/76561198176022675#!/compare/1586131200/1586217600

https://backpack.tf/profiles/76561198322560312#!/compare/1586131200/1586217600

https://backpack.tf/profiles/76561198176022675#!/compare/1586131200/1586217600

https://backpack.tf/profiles/76561198084017709#!/compare/1584489600/1586390400

https://backpack.tf/profiles/76561198063127837#!/compare/1585958400/1586390400

https://backpack.tf/profiles/76561198972294135#!/compare/1586304000/1586390400

Untrace / bulk / gambling

sale 2:

https://backpack.tf/profiles/76561198259466535#!/compare/1583971200/1585094400

https://backpack.tf/profiles/76561198305494036#!/compare/1585094400/1585267200

Untrace

sale 3:

https://backpack.tf/profiles/76561198305494036#!/compare/1586044800/1586131200

https://backpack.tf/profiles/76561198176022675#!/compare/1586131200/1586217600

Untrace

sale 4:

https://backpack.tf/profiles/76561198176022675#!/compare/1586131200/1586217600

https://backpack.tf/profiles/76561198850274253#!/compare/1586131200/1586217600

Bulk

sale 5:

https://backpack.tf/profiles/76561198850274253#!/compare/1586217600/1586304000

https://backpack.tf/profiles/76561198261795972#!/compare/1586217600/1586736000

Sold for 8 keys

sale 6:

https://backpack.tf/profiles/76561198057074888#!/compare/1586044800/1586476800

https://backpack.tf/profiles/76561198146477608#!/compare/1586217600/1586995200

Untrace

sale 7:

https://backpack.tf/profiles/76561198144879030#!/compare/1579305600/1582761600

https://backpack.tf/profiles/76561198337734785#!/compare/1579824000/1579910400

Sold for Stormy Hallmark

Hallmark Mini:

https://backpack.tf/suggestion/5ea2ba1091ec053308648b1d

Suggestion for 12 keys

sale 8:

https://backpack.tf/profiles/76561198337734785#!/compare/1582329600/1582416000

https://backpack.tf/profiles/76561198354459626#!/compare/1582329600/1582416000

can trace 8 keys, probably more

sale 9:

https://marketplace.tf/items/tf2/30135;5;u61

$25.54 / $1.75 = 14.59 keys <--- https://backpack.tf/item/7957394515

$22 / $1.71 = 12.87 keys

$22 / $1.71 = 12.87 keys

$11 / $1.70 = 6.47 keys <--- https://backpack.tf/item/2639784610

$17.99 / $1.79 = 10.05 keys

$17.99 / $1.77 = 10.16 keys

Total sales @:

6.5, 8, 10, 10, 12, 13, 13, 15 keys

buyers up to ~7.5 keys,

calling 8 low,

15 high,

taking 10 - 13 keys.