Sale 1:

https://backpack.tf/profiles/76561198172820673#!/compare/1587254400/1587600000

https://backpack.tf/profiles/76561198382654640#!/compare/1587513600/1587600000

QS

sale 2:

https://backpack.tf/profiles/76561198145393927#!/compare/1587513600/1587600000

https://backpack.tf/profiles/76561198129205357#!/compare/1587513600/1587600000

Bulk

sale 3:

https://backpack.tf/profiles/76561198129205357#!/compare/1587513600/1587600000

https://backpack.tf/profiles/76561198832639251#!/compare/1587513600/1587600000

Bulk

sale 4:

https://backpack.tf/profiles/76561198040141126#!/compare/1586736000/1586908800

https://backpack.tf/profiles/76561198055622215#!/compare/1586736000/1586822400

Bulk

sale 5:

https://backpack.tf/profiles/76561198335791307#!/compare/1582934400/1583020800

https://backpack.tf/profiles/76561198253183302#!/compare/1584230400/1584748800

Untrace

sale 6:

https://backpack.tf/profiles/76561198253183302#!/compare/1584748800/1585872000

https://backpack.tf/profiles/76561197968633696#!/compare/1584748800/1585699200

SCM?

sale 7:

https://backpack.tf/profiles/76561198403189201#!/compare/1581984000/1582329600

https://backpack.tf/profiles/76561198334598690#!/compare/1582243200/1582329600

QS

sale 8:

https://backpack.tf/profiles/76561198334598690#!/compare/1582675200/1582761600

https://backpack.tf/profiles/76561198354459626#!/compare/1582675200/1582761600

Sold for ~8 keys

sale 9:

https://backpack.tf/profiles/76561198843966433#!/compare/1582070400/1581984000

https://backpack.tf/profiles/76561198122107265#!/compare/1581984000/1582070400

https://backpack.tf/profiles/76561198843966433#!/compare/1582329600/1582416000

tradeback

sale 10:

https://backpack.tf/profiles/76561198454615761#!/compare/1586563200/1586649600

https://backpack.tf/profiles/76561198045539980#!/compare/1586649600/1586736000

Sold for DBD Crack

use there

https://bot.tf/stats/listings/4P09VVOE

B/O of 9 keys

Sale 11:

https://backpack.tf/profiles/76561198143247129#!/compare/1582761600/1582761600

https://backpack.tf/profiles/76561198087469169#!/compare/1582502400/1584230400

Untrace

sale 12:

https://marketplace.tf/items/tf2/30842;5;u3004

$15.99 / $1.78 = 8.98 keys

$9.05 / $1.77 = 5.11 keys

$19.5 / $1.77 = 11.02 keys

$26.23 / $1.76 = 14.90 keys

$9.15 / $1.71 = 5.35 keys

$9.75 / $1.72 = 5.67 keys

$9.37 / $1.69 = 5.54 keys

$19.79 / $1.69 = 11.71 keys <--- https://backpack.tf/item/7056271953

$19.5 / $1.68 = 11.61 keys

Total sales @:

8, 9, 11, 12, 12, 15 keys

buyers up to ~7 keys,

note that MPTF sales at ~5 keys are all buy orders,

sellers at 8 keys, both aging,

seller at ~8.5 keys,

unsold for almost a month,

taking 8 - 12 keys.