Sale 1:

https://backpack.tf/profiles/76561198337734785#!/compare/1579996800/1580083200

https://backpack.tf/profiles/76561198088266191#!/compare/1579910400/1579996800

Can trace 28 keys in a group of 43...

sale 2:

https://backpack.tf/profiles/76561198088266191#!/compare/1580169600/1580256000

https://backpack.tf/profiles/76561198088822281#!/compare/1580256000/1580688000

Sold for Phos Metal Slug

use there, only usable sale

https://bot.tf/stats/listings/4OV8OZ0J

B/O for 18 keys

sale 3:

https://backpack.tf/profiles/76561198088822281#!/compare/1581811200/1582070400

https://backpack.tf/profiles/76561198072390053#!/compare/1581984000/1582070400

Sold for 15 keys (6 used to buy Taunt)

sale 4:

https://backpack.tf/profiles/76561198047941585#!/compare/1585267200/1585353600

https://backpack.tf/profiles/76561198012613726#!/compare/1585353600/1585440000

QS for ~12 keys

Sale 5:

https://backpack.tf/profiles/76561198117361605#!/compare/1553212800/1585958400

https://backpack.tf/profiles/76561198012613726#!/compare/1585872000/1585958400

QS?

Sale 6:

https://backpack.tf/profiles/76561198213808393#!/compare/1580515200/1580601600

https://backpack.tf/profiles/76561198181181337#!/compare/1580428800/1580515200

Untrace

sale 7:

https://backpack.tf/profiles/76561198418740133#!/compare/1582848000/1582934400

https://backpack.tf/profiles/76561198122083141#!/compare/1582848000/1582934400

Bulk

Sale 8:

https://backpack.tf/profiles/76561198122083141#!/compare/1583971200/1584057600

https://backpack.tf/profiles/76561198176734455#!/compare/1583884800/1584057600

Sold for ~13 keys

sale 9:

https://backpack.tf/profiles/76561198337734785#!/compare/1586304000/1586390400

https://backpack.tf/profiles/76561198311320985#!/compare/1586304000/1586390400

https://backpack.tf/profiles/76561198311320985#!/compare/1586390400/1586476800

https://backpack.tf/profiles/76561198337734785#!/compare/1586390400/1586476800

tradeback

sale 10:

https://backpack.tf/profiles/76561198337734785#!/compare/1587340800/1587427200

https://backpack.tf/profiles/76561198003182128#!/compare/1587340800/1587427200

Keys

sale 11:

https://backpack.tf/profiles/76561198164721898#!/compare/1580515200/1580601600

https://backpack.tf/profiles/76561198337734785#!/compare/1580515200/1580601600

QS

sale 12:

https://backpack.tf/profiles/76561198337734785#!/compare/1581811200/1581897600

https://backpack.tf/profiles/76561198081925059#!/compare/1581811200/1581897600

Keys

sale 13:

https://backpack.tf/profiles/76561198081925059#!/compare/1583020800/1583107200

https://backpack.tf/profiles/76561198072046829#!/compare/1583020800/1583107200

Untrace

Sale 14:

https://backpack.tf/profiles/76561198072046829#!/compare/1583107200/1583193600

https://backpack.tf/profiles/76561198077870175#!/compare/1583107200/1583193600

Sold for 16 keys

sale 15:

https://backpack.tf/profiles/76561198077870175#!/compare/1583107200/1583193600

https://backpack.tf/profiles/76561198870374830#!/compare/1583107200/1583193600

Sold for 17 keys

sale 16:

https://backpack.tf/profiles/76561198870374830#!/compare/1583193600/1583452800

https://backpack.tf/profiles/76561198271915998#!/compare/1583366400/1583452800

Sold for Stormy Snowcapped + 4 keys

Snowcapped mini:

https://backpack.tf/suggestion/5eaa33fafc46a13cb829332a

Suggestion for 12 keys

Total is 16 keys

sale 17:

https://backpack.tf/profiles/76561198271915998#!/compare/1583452800/1583539200

https://backpack.tf/profiles/76561198305494036#!/compare/1583452800/1583539200

QS

sale 18:

https://backpack.tf/profiles/76561198305494036#!/compare/1583625600/1583712000

https://backpack.tf/profiles/76561198091502579#!/compare/1583625600/1583712000

Sold for 16 keys

sale 19:

https://backpack.tf/profiles/76561198147532685#!/compare/1584403200/1584748800

https://backpack.tf/profiles/76561198036445124#!/compare/1584662400/1584748800

Bulk

sale 20:

https://backpack.tf/profiles/76561198036445124#!/compare/1586044800/1586304000

https://backpack.tf/profiles/76561198036385359#!/compare/1586217600/1586304000

Sold for P Fetti Blast + 7 keys

Blast mini:

https://backpack.tf/suggestion/5ea8cbaf0cb345015e1c05ad

Suggestion for 8.75 keys

Total is 15.75 keys

https://bot.tf/stats/listings/4KV0ER58

B/O of 16 keys

Sale 21:

https://backpack.tf/profiles/76561198036385359#!/compare/1587340800/1587513600

https://backpack.tf/profiles/76561198118061700#!/compare/1587427200/1587513600

Sold with ~2 keys in sweets for Slumber Cranial

use there

Sale 22:

https://marketplace.tf/items/tf2/30863;5;u19

$39.99 / $1.76 = 22.72 keys

Total sales @:

13, 15, 16, 16, 16, 16, 17, 23 keys

buyers up to ~12.34 keys,

sellers at ~25 keys,

calling 13 low,

23 high,

taking 15 - 17 keys.