Sale 1:

https://backpack.tf/profiles/76561198000514916#!/compare/1582156800/1582329600

https://backpack.tf/profiles/76561198329940613#!/compare/1581984000/1582416000

Sold for ~10 keys

Sale 2:

https://backpack.tf/profiles/76561198329940613#!/compare/1583107200/1583193600

https://backpack.tf/profiles/76561198039825290#!/compare/1583107200/1583193600

Sold for DBD Hottie

use there

https://bot.tf/stats/listings/MVRVW00V

B/O of 13 keys

Sale 3:

https://backpack.tf/profiles/76561198105057301#!/compare/1582502400/1585180800

https://backpack.tf/profiles/76561198821294885#!/compare/1585094400/1585180800

Untrace

sale 4:

https://backpack.tf/profiles/76561198392734059#!/compare/1579996800/1580169600

https://backpack.tf/profiles/76561198050625602#!/compare/1584144000/1584748800

SCM

Sale 5:

https://backpack.tf/profiles/76561198161322716#!/compare/1583884800/1586304000

https://backpack.tf/profiles/76561198454615761#!/compare/1584748800/1584835200

Sold for ~6 keys in sweets

sale 6:

https://backpack.tf/profiles/76561198026129220#!/compare/1581552000/1581638400

https://backpack.tf/profiles/76561198292807839#!/compare/1581120000/1581984000

Untrace

Sale 7:

https://backpack.tf/profiles/76561198066963830#!/compare/1581033600/1581120000

https://backpack.tf/profiles/76561198077870175#!/compare/1580947200/1581033600

Untrace

sale 8:

https://backpack.tf/profiles/76561198302399911#!/compare/1581033600/1581120000

https://backpack.tf/profiles/76561198302399911#!/compare/1581033600/1581120000

sold with ~7.5 keys for DBD Forge

use there

Sale 9:

https://backpack.tf/profiles/76561198302399911#!/compare/1581033600/1581120000

https://backpack.tf/profiles/76561198186284689#!/compare/1581120000/1581206400

Sold for ~7 keys

Sale 10:

https://backpack.tf/profiles/76561198186284689#!/compare/1581897600/1583107200

https://backpack.tf/profiles/76561198271747479#!/compare/1582502400/1583452800

SCM

Sale 11 - 16:

https://marketplace.tf/items/tf2/309;5;u61;strange

$12.05 / $1.78 = 6.77 keys

$24.99 / $1.77 = 14.12 keys <--- https://backpack.tf/item/2606530379

$16.05 / $1.75 = 9.17 keys

$20.78 / $1.77 = 11.74 keys

$21.73 / $1.72 = 12.63 keys <--- https://backpack.tf/item/7957393178

$16.2 / $1.69 = 9.59 keys

Sale 17:

https://marketplace.tf/items/tf2/309;5;u61

$12 / $1.73 = 6.94 keys

$20.99 / $1.68 = 12.49 keys

$20.78 / $1.78 = 11.67 keys <--- https://backpack.tf/item/7956637587

Total sales @:

6, 7, 7, 7, 9, 9.5, 10, 12, 12, 12, 13, 14 keys

buyers up to 7 keys,

unsold for 2 months at 12 keys,

calling 7 low,

13 high,

taking 9 - 12 keys.