Sale 1:

https://backpack.tf/profiles/76561198161378521#!/compare/1579910400/1580169600

https://backpack.tf/profiles/76561198046862149#!/compare/1579737600/1579910400

untrace

sale 2:

https://backpack.tf/profiles/76561198046862149#!/compare/1579910400/1580515200

https://backpack.tf/profiles/76561198346516392#!/compare/1580256000/1580342400

Untrace

sale 3:

https://backpack.tf/profiles/76561198012503085#!/compare/1580342400/1580428800

https://backpack.tf/profiles/76561197984373540#!/compare/1580342400/1580428800

Bulk / gambling?

sale 4:

https://backpack.tf/profiles/76561198020673987#!/compare/1581897600/1587686400

https://backpack.tf/profiles/76561198337734785#!/compare/1581897600/1581984000

QS

sale 5:

https://backpack.tf/profiles/76561198341171690#!/compare/1580256000/1580342400

https://backpack.tf/profiles/76561198012503085#!/compare/1580256000/1580342400

Sold for ~6.5 keys

sale 6:

https://backpack.tf/profiles/76561198012503085#!/compare/1580342400/1580428800

https://backpack.tf/profiles/76561198395110551#!/compare/1580342400/1580428800

https://backpack.tf/profiles/76561198134546405#!/compare/1580428800/1580515200

https://backpack.tf/profiles/76561198179783329#!/compare/1580601600/1580688000

https://backpack.tf/profiles/76561198247880244#!/compare/1580601600/1580860800

https://backpack.tf/profiles/76561199020400438#!/compare/1580860800/1585526400

https://backpack.tf/profiles/76561198134546405#!/compare/1580774400/1580860800

https://backpack.tf/profiles/76561198852030014#!/compare/1579219200/1580860800

https://backpack.tf/profiles/76561198134546405#!/compare/1580774400/1580860800

https://backpack.tf/profiles/76561198852030014#!/compare/1579219200/1580860800

https://backpack.tf/profiles/76561198177719569#!/compare/1580774400/1580860800

https://backpack.tf/profiles/76561198097209458#!/compare/1580515200/1581033600

https://backpack.tf/profiles/76561198012609099#!/compare/1580947200/1581033600

https://backpack.tf/profiles/76561199017926833#!/compare/1580947200/1581033600

https://backpack.tf/profiles/76561198038203241#!/compare/1576022400/1581120000

https://backpack.tf/profiles/76561198408436752#!/compare/1581120000/1581206400

Gambling / bulk / untrace

sale 7:

https://backpack.tf/profiles/76561198097442448#!/compare/1586822400/1586908800

https://backpack.tf/profiles/76561198196435138#!/compare/1586476800/1586908800

Sold for spells

sale 8:

https://backpack.tf/profiles/76561198799353956#!/compare/1585872000/1585958400

https://backpack.tf/profiles/76561198067881589#!/compare/1585785600/1585958400

Sold with negligible sweets for Stormy Snowcapped

use there

Sale 9:

https://backpack.tf/profiles/76561198067881589#!/compare/1586822400/1586908800

https://backpack.tf/profiles/76561198115571320#!/compare/1586649600/1586995200

Untrace

sale 10:

https://backpack.tf/profiles/76561198115571320#!/compare/1586995200/1587686400

https://backpack.tf/profiles/76561198084219943#!/compare/1586995200/1587081600

Untrace

sale 11:

https://backpack.tf/profiles/76561198084219943#!/compare/1586995200/1587081600

https://backpack.tf/profiles/76561198247468490#!/compare/1587081600/1587168000

Sold for ~13 keys in sweets

sale 12:

https://marketplace.tf/items/tf2/30029;5;u57

$13.8 / $1.79 = 7.71 keys

$13.8 / $1.76 = 7.84 keys

$14 / $1.75 = 8.00 keys

$13 / $1.71 = 7.60 keys <--- https://backpack.tf/item/2401196089

$14.5 / $1.68 = 8.63 keys

$12.9 / $1.78 = 7.25 keys

Total sales @:

6.5, 7.5, 7.5, 7.5, 8, 8, 8.5, 13 keys

buyers up to 6 keys,

10 month unsold for 10 keys,

2 week unsold for ~8.5 keys,

https://i.imgur.com/vMH6sz1.jpg

https://i.imgur.com/j3ew52U.jpg

calling 6.5 low,

13 high,

taking 7.5 - 8.5 keys.