Sale 1:

https://backpack.tf/profiles/76561198214004067#!/compare/1579651200/1579910400

https://backpack.tf/profiles/76561198039152128#!/compare/1579564800/1582329600

Untrace

Sale 2:

https://backpack.tf/profiles/76561198016430067#!/compare/1583971200/1584057600

https://backpack.tf/profiles/76561198828088278#!/compare/1583452800/1584144000

Untrace

Sale 3:

https://backpack.tf/profiles/76561199010842391#!/compare/1583971200/1584057600

https://backpack.tf/profiles/76561198057412106#!/compare/1583884800/1583971200

Bulk

sale 4:

https://backpack.tf/profiles/76561198057412106#!/compare/1583884800/1583971200

https://backpack.tf/profiles/76561198217385159#!/compare/1583884800/1583971200

Bulk

Sale 5:

https://backpack.tf/profiles/76561198217385159#!/compare/1584662400/1584748800

https://backpack.tf/profiles/76561198317907934#!/compare/1584662400/1584748800

Sold for 9 keys

Sale 6:

https://backpack.tf/profiles/76561198317907934#!/compare/1584921600/1585008000

https://backpack.tf/profiles/76561198244719404#!/compare/1584835200/1584921600

Sold for CPS Burglerre + ~0.49 keys in sweets

use there

Sale 7:

https://backpack.tf/profiles/76561198244719404#!/compare/1585612800/1585785600

https://backpack.tf/profiles/76561198196410274#!/compare/1585699200/1585785600

Sold with 3 keys for C9 Pile of Scrap + negligible sweets

use there

Sale 8:

https://backpack.tf/profiles/76561198196410274#!/compare/1585699200/1585785600

https://backpack.tf/profiles/76561198394963563#!/compare/1585612800/1585785600

Sold for TW Geezer + 3 keys

use there

sale 9:

https://backpack.tf/profiles/76561198394963563#!/compare/1585958400/1586131200

https://backpack.tf/profiles/76561198170139169#!/compare/1585958400/1586044800

Untrace

Sale 10:

https://backpack.tf/profiles/76561198170139169#!/compare/1586044800/1586131200

https://backpack.tf/profiles/76561198956707902#!/compare/1586044800/1586131200

Sold for Steaming Shako

use there

Sale 11:

https://backpack.tf/profiles/76561198956707902#!/compare/1586044800/1586131200

https://backpack.tf/profiles/76561198271371098#!/compare/1585008000/1586131200

Can trace 3 keys

Sale 12:

https://backpack.tf/profiles/76561198271371098#!/compare/1585008000/1586131200

https://backpack.tf/profiles/76561198088551406#!/compare/1586044800/1586131200

Sold for Planets France(?) high, probably something else involved.

Sale 13:

https://backpack.tf/profiles/76561198138170333#!/compare/1581811200/1585008000

https://backpack.tf/profiles/76561198080179568#!/compare/1586217600/1586304000

Untrace

Sale 14:

https://backpack.tf/profiles/76561198080179568#!/compare/1586908800/1586995200

https://backpack.tf/profiles/76561198413604994#!/compare/1586908800/1586995200

Sold for Aces Airdog + 4 keys

use there

Sale 15:

https://backpack.tf/profiles/76561198989899223#!/compare/1581465600/1581552000

https://backpack.tf/profiles/76561198359746121#!/compare/1581379200/1581465600

Sold with ~3.5 keys in sweets for P Fetti Eyewear

use there

Sale 16:

https://backpack.tf/profiles/76561198359746121#!/compare/1581552000/1581638400

https://backpack.tf/profiles/76561198820768973#!/compare/1581552000/1581638400

Sold for 10 keys

sale 17:

https://backpack.tf/profiles/76561198820768973#!/compare/1581638400/1581724800

https://backpack.tf/profiles/76561198131081286#!/compare/1581638400/1581724800

https://backpack.tf/profiles/76561198820768973#!/compare/1581638400/1581724800

tradeback(?)

Sale 18:

https://backpack.tf/profiles/76561198820768973#!/compare/1582070400/1582156800

https://backpack.tf/profiles/76561198376316409#!/compare/1581465600/1582070400

Can trace 2 refined

Sale 19:

https://backpack.tf/profiles/76561198376316409#!/compare/1582070400/1582156800

https://backpack.tf/profiles/76561198410172951#!/compare/1582070400/1586908800

Sold for DP Bone Dome + 1 key

use there

Sale 20:

https://backpack.tf/profiles/76561198410172951#!/compare/1582156800/1582243200

https://backpack.tf/profiles/76561198385509796#!/compare/1574294400/1583193600

SCM

Sale 21:

https://backpack.tf/profiles/76561198052542442#!/compare/1586563200/1586649600

https://backpack.tf/profiles/76561198093114319#!/compare/1586217600/1586649600

Sold for ~9 keys

Sale 22:

https://backpack.tf/profiles/76561198093114319#!/compare/1586649600/1586736000

https://backpack.tf/profiles/76561198064982470#!/compare/1586649600/1586736000

Sold for 9 keys

sale 23:

https://backpack.tf/profiles/76561197999507606#!/compare/1583193600/1585267200

https://backpack.tf/profiles/76561198880361166#!/compare/1585785600/1586044800

Bulk

Sale 24:

https://backpack.tf/profiles/76561198880361166#!/compare/1586217600/1586304000

https://backpack.tf/profiles/76561197984373540#!/compare/1586131200/1586217600

https://backpack.tf/profiles/76561198976233202#!/compare/1586217600/1587081600

https://backpack.tf/profiles/76561198322560312#!/compare/1586217600/1586304000

https://backpack.tf/profiles/76561198176022675#!/compare/1586217600/1586304000

https://backpack.tf/profiles/76561198118157202#!/compare/1586217600/1586304000

https://backpack.tf/profiles/76561198337734785#!/compare/1586217600/1586304000

Untrace / bulk / QS

Sale 25:

https://backpack.tf/profiles/76561198337734785#!/compare/1586217600/1586304000

https://backpack.tf/profiles/76561198123796333#!/compare/1586304000/1586390400

Sold for ~9.50 keys

Sale 26:

https://backpack.tf/profiles/76561198123796333#!/compare/1587081600/1587168000

https://backpack.tf/profiles/76561198342979708#!/compare/1587081600/1587168000

Sold with negligible sweets for C9 Tyrantium

use there, few sales

Sale 27:

https://backpack.tf/profiles/76561198342979708#!/compare/1587168000/1587254400

https://backpack.tf/profiles/76561198068546927#!/compare/1587168000/1587254400

Sold for 10 keys

Sale 28:

https://backpack.tf/profiles/76561198068546927#!/compare/1587168000/1587254400

https://backpack.tf/profiles/76561198395318833#!/compare/1587168000/1587254400

Bulk

sale 29:

https://backpack.tf/profiles/76561198395318833#!/compare/1587168000/1587254400

https://backpack.tf/profiles/76561198251713434#!/compare/1587081600/1587254400

Sold with ~1 key in sweets for 11 keys

Total is 10 keys

Sale 30:

https://backpack.tf/profiles/76561198251713434#!/compare/1587340800/1587427200

https://backpack.tf/profiles/76561198124241068#!/compare/1587340800/1587427200

Sold with ~0.5 keys in sweets for P Fetti Armored + ~1 key in sweets

use there

Sale 31:

https://marketplace.tf/items/tf2/30767;5;u15

$21 / $1.70 = 12.35 keys

Total sales @:

9, 9, 9, 9.5, 10, 10, 10, 12 keys

buyers up to ~8.5 keys,

sellers down to 12 keys,

calling 12 an outlier,

taking 9 - 10 keys.