Sale 1:

https://backpack.tf/profiles/76561198317997484#!/compare/1571529600/1571616000

https://backpack.tf/profiles/76561198067402592#!/compare/1571443200/1571616000

Sold for OF Herald + ~2 keys in sweets

sale 2:

https://backpack.tf/profiles/76561198067402592#!/compare/1572307200/1572825600

https://backpack.tf/profiles/76561198080179568#!/compare/1572739200/1572825600

Sold for 14 keys

sale 3:

https://backpack.tf/profiles/76561198113899098#!/compare/1573171200/1573257600

https://backpack.tf/profiles/76561198119270680#!/compare/1572998400/1573257600

Sold for KaW Dogger

Dogger Mini:

https://backpack.tf/suggestion/5dcdfa97d3817232f74e78b5

Suggestion for 12.5 keys

sale 4:

https://backpack.tf/profiles/76561198031657211#!/compare/1573084800/1573344000

https://backpack.tf/profiles/76561198363395191#!/compare/1573257600/1573344000

Sold for ~12 keys

sale 5:

https://backpack.tf/profiles/76561198363395191#!/compare/1573344000/1573430400

https://backpack.tf/profiles/76561198109068337#!/compare/1573430400/1573516800

Untrace

sale 6:

https://backpack.tf/profiles/76561198042157695#!/compare/1548979200/1567641600

https://backpack.tf/profiles/76561198237597396#!/compare/1569196800/1569542400

https://backpack.tf/profiles/76561198140608653#!/compare/1569110400/1569283200

Untrace then SCM

sale 7:

https://backpack.tf/profiles/76561198140608653#!/compare/1571270400/1571875200

https://backpack.tf/profiles/76561198874030031#!/compare/1572393600/1572480000

SCM

sale 8:

https://backpack.tf/profiles/76561198874030031#!/compare/1573171200/1573689600

https://backpack.tf/profiles/76561198071588645#!/compare/1572998400/1573171200

Sold with 2 keys for KaW Noble

Noble Mini:

https://backpack.tf/suggestion/5dce09b8678072633b303b8f

Suggestion for 13.5 keys

Total is 11.5 keys

Sale 9:

https://backpack.tf/profiles/76561198071588645#!/compare/1573171200/1573257600

https://backpack.tf/profiles/76561198048851745#!/compare/1573171200/1573257600

Sold for ~10 keys (QS)

sale 10:

https://backpack.tf/profiles/76561198151594335#!/compare/1569110400/1569196800

https://backpack.tf/profiles/76561198314349856#!/compare/1569110400/1569196800

Sold for OF Bonnet(12)

sale 11:

https://backpack.tf/profiles/76561198314349856#!/compare/1569110400/1569196800

https://backpack.tf/profiles/76561198384349249#!/compare/1569196800/1569283200

Bulky

sale 12:

https://backpack.tf/profiles/76561198384349249#!/compare/1569196800/1569283200

https://backpack.tf/profiles/76561198323565601#!/compare/1569196800/1569283200

Sold for ~10 keys (QS)

sale 13:

https://backpack.tf/profiles/76561198323565601#!/compare/1569196800/1569283200

https://backpack.tf/profiles/76561198089253101#!/compare/1569196800/1569283200

Bulk QS

sale 14:

https://marketplace.tf/items/tf2/341;5;u59

$21 / $1.80 = 11.67 keys

Total sales @:

10, 10, 11.5, 11.67, 12, 12, 12.5, 14 keys

buyers up to 10 keys,

sellers at 11, 12 keys,

note that there seems to be a high buyer over sellers (for some reason) that blips in and out of existence,

watch the seller at 11 as it ages:

https://backpack.tf/item/7956543546

lets take 12 - 13 keys for now.