Sale 1:

https://backpack.tf/profiles/76561198322560312#!/compare/1580428800/1580515200

https://backpack.tf/profiles/76561198258725696#!/compare/1579651200/1580428800

untrace

sale 2:

https://backpack.tf/profiles/76561198080179568#!/compare/1584057600/1584144000

https://backpack.tf/profiles/76561198091930188#!/compare/1584057600/1584144000

Sold for 9 keys

sale 3:

https://backpack.tf/profiles/76561198091930188#!/compare/1584230400/1584316800

https://backpack.tf/profiles/76561198089026889#!/compare/1583280000/1584316800

Sold for ~9.5 keys in sweets

sale 4:

https://backpack.tf/profiles/76561198089026889#!/compare/1584748800/1584835200

https://backpack.tf/profiles/76561198418740133#!/compare/1584748800/1584835200

Sold for C9 Fruit Shoot(11)

Sale 5:

https://backpack.tf/profiles/76561198418740133#!/compare/1584835200/1584921600

https://backpack.tf/profiles/76561198322380737#!/compare/1584662400/1584921600

sold for TW Armored + ~1 key in sweets

Armored Mini:

https://backpack.tf/suggestion/5ea16a893f2e7976ed5eb7d8

Suggestion for 11.5 keys

Total is 12.5 keys

Sale 6:

https://backpack.tf/profiles/76561198322380737#!/compare/1584921600/1585008000

https://backpack.tf/profiles/76561198158206236#!/compare/1584835200/1585008000

Sold with 2 keys for C9 Warhood

use there

sale 10:

https://backpack.tf/profiles/76561198048654142#!/compare/1583366400/1585094400

https://backpack.tf/profiles/76561198196410274#!/compare/1583452800/1583539200

Sold for ~8 keys in sweets

sale 11:

https://backpack.tf/profiles/76561198196410274#!/compare/1583452800/1583539200

https://backpack.tf/profiles/76561198357120931#!/compare/1583452800/1583539200

https://backpack.tf/profiles/76561198187108663#!/compare/1583193600/1583539200

https://backpack.tf/profiles/76561198196410274#!/compare/1583452800/1583539200

untrace / transfer

sale 12:

https://backpack.tf/profiles/76561198196410274#!/compare/1583452800/1583539200

https://backpack.tf/profiles/76561198916430174#!/compare/1583452800/1583539200

Sold for TW Whoopee + 1 key

Whoopee Mini:

https://backpack.tf/suggestion/5ea1d5891ff1297bc96bb4ca

Suggestion for 10 keys

Total is 11 keys

Sale 13:

https://backpack.tf/profiles/76561198916430174#!/compare/1583539200/1583625600

https://backpack.tf/profiles/76561198363412851#!/compare/1582243200/1583625600

Sold for ~8.5 keys (most used to buy Strontium)

sale 14:

https://marketplace.tf/items/tf2/30332;5;u57

$19.95 / $1.72 = 11.60 keys

https://backpack.tf/item/7955740489

total sales @:

8, 8, 9, 9.5, 11, 11, 12 keys

buyers up to ~8 keys, one high buyer for near 9 keys,

calling 8 low,

12 high to balance,

taking 9 - 11 keys.