Sale 1:

https://backpack.tf/profiles/76561198077173426#!/compare/1585353600/1585785600

https://backpack.tf/profiles/76561198305494036#!/compare/1585699200/1585785600

Sold for ~32 keys (QS)

sale 2:

https://backpack.tf/profiles/76561198305494036#!/compare/1585785600/1585872000

https://backpack.tf/profiles/76561198010482185#!/compare/1585699200/1585872000

Sold for 34 keys

sale 3:

https://backpack.tf/profiles/76561198010482185#!/compare/1586044800/1586131200

https://backpack.tf/profiles/76561198059021831#!/compare/1586044800/1586131200

Bulk

sale 4:

https://backpack.tf/profiles/76561198295486957#!/compare/1586649600/1586736000

https://backpack.tf/profiles/76561198131362066#!/compare/1586649600/1586736000

Untrace

sale 5:

https://backpack.tf/profiles/76561198131362066#!/compare/1586822400/1586908800

https://backpack.tf/profiles/76561198280667527#!/compare/1586736000/1586908800

Keys or Samur-Eye, can't tell.

sale 6:

https://backpack.tf/profiles/76561198280667527#!/compare/1587168000/1587427200

https://backpack.tf/profiles/76561198307602421#!/compare/1587168000/1587254400

Sold for DBD Tyrant + negligible sweets

use there

https://bot.tf/stats/listings/4WX9QJK5

B/O of 37 keys

sale 7:

https://backpack.tf/profiles/76561198094634371#!/compare/1582588800/1582675200

https://backpack.tf/profiles/76561198142873343#!/compare/1582243200/1586390400

Untrace

sale 8:

https://backpack.tf/profiles/76561198059523197#!/compare/1582761600/1584576000

https://backpack.tf/profiles/76561197984528025#!/compare/1583625600/1584144000

Untrace

Sale 9:

https://marketplace.tf/items/tf2/30119;5;u62

$80 / $1.76 = 45.45 keys

$44.44 / $1.74 = 25.54 keys

$60 / $1.71 = 35.09 keys

$55 / $1.67 = 32.93 keys

$68.06 / $1.69 = 40.27 keys

$45.14 / $1.69 = 26.71 keys

$60 / $1.77 = 33.90 keys

$69.95 / $1.79 = 39.08 keys

$80 / $1.82 = 43.96 keys

$84.99 / $1.88 = 45.21 keys

Total sales @:

26, 27, 32, 33, 34, 34, 35, 39, 40, 44, 45, 45 keys

buyers up to 33 keys,

sellers at 40 keys,

calling 44 high,

33 low,

taking 34 - 40 keys.