Sale 1:

https://backpack.tf/profiles/76561198080179568#!/compare/1590710400/1590796800

https://backpack.tf/profiles/76561198089253101#!/compare/1590710400/1590796800

Sold for 10 keys

sale 2:

https://backpack.tf/profiles/76561198089253101#!/compare/1590796800/1590883200

https://backpack.tf/profiles/76561197990636402#!/compare/1590883200/1590969600

https://backpack.tf/profiles/76561198012537041#!/compare/1590883200/1590969600

https://backpack.tf/profiles/76561198253519146#!/compare/1590883200/1590969600

https://backpack.tf/profiles/76561198063019051#!/compare/1590969600/1591056000

Gambling / bulk / untrace

sale 3:

https://backpack.tf/profiles/76561198063019051#!/compare/1591056000/1591142400

https://backpack.tf/profiles/76561198166783479#!/compare/1591056000/1591142400

Sold with 3 keys for C9 Dogger

dogger Mini:

https://backpack.tf/suggestion/5f24caeca5ddfc61ab0dbc6a

Suggestion for 16.5 keys

Total is 13.5 keys

Sale 4:

https://backpack.tf/profiles/76561198080179568#!/compare/1589068800/1589155200

https://backpack.tf/profiles/76561198313669590#!/compare/1589155200/1589241600

untrace

sale 5:

https://backpack.tf/profiles/76561198313669590#!/compare/1589760000/1590710400

https://backpack.tf/profiles/76561198337734785#!/compare/1589673600/1589760000

QS

sale 6:

https://backpack.tf/profiles/76561198337734785#!/compare/1590796800/1590883200

https://backpack.tf/profiles/76561198089253101#!/compare/1590796800/1590883200

Sold for ~11 keys (could use a double count)

Sale 7:

https://backpack.tf/profiles/76561198089253101#!/compare/1590796800/1590883200

https://backpack.tf/profiles/76561198012537041#!/compare/1590883200/1590969600

https://backpack.tf/profiles/76561198179253523#!/compare/1590537600/1590969600

Untrace

sale 8:

https://backpack.tf/profiles/76561198272353085#!/compare/1591488000/1591574400

https://backpack.tf/profiles/76561198126167104#!/compare/1591574400/1591660800

Untrace

sale 9:

https://backpack.tf/profiles/76561198126167104#!/compare/1591574400/1591660800

https://backpack.tf/profiles/76561198131466025#!/compare/1591574400/1591660800

Untrace

sale 10:

https://backpack.tf/profiles/76561198131466025#!/compare/1592524800/1592611200

https://backpack.tf/profiles/76561198107676964#!/compare/1592438400/1592524800

Sold with negligible sweets for Smoking Fez

use there

https://bot.tf/stats/listings/Y809EJ0N

B/O of ~12 keys

sale 11:

https://backpack.tf/profiles/76561198107676964#!/compare/1592611200/1592697600

https://backpack.tf/profiles/76561198118518523#!/compare/1591574400/1592697600

Bulky

sale 12:

https://backpack.tf/profiles/76561198118518523#!/compare/1591574400/1592697600

https://backpack.tf/profiles/76561198194446835#!/compare/1592611200/1592697600

Sold for ~7 keys

sale 13:

https://backpack.tf/profiles/76561198194446835#!/compare/1592611200/1592697600

https://backpack.tf/profiles/76561198128029573#!/compare/1592697600/1592784000

Untrace

sale 14:

https://backpack.tf/profiles/76561198128029573#!/compare/1592697600/1592784000

https://backpack.tf/profiles/76561198021228339#!/compare/1592697600/1592784000

Sold with ~0.5 keys in sweets for P Fetti Eyewear(12)

Total is ~11.5 keys

sale 15:

https://backpack.tf/profiles/76561198021228339#!/compare/1592870400/1592956800

https://backpack.tf/profiles/76561198841365001#!/compare/1592870400/1592956800

Bulk / untrace

sale 16:

https://marketplace.tf/items/tf2/30545;5;u61

$20.75 / $1.90 = 10.92 keys

$20.75 / $1.90 = 10.92 keys <--- https://backpack.tf/item/7956199248

$24.99 / $1.91 = 13.08 keys

$20 / $1.99 = 10.05 keys

$24.99 / $1.92 = 13.02 keys

$20.99 / $1.92 = 10.93 keys <--- https://backpack.tf/item/7956888660

Total sales @:

7, 10, 10, 11, 11, 11, 11, 12, 13, 13, 14 keys

buyers up to ~9.28 keys,

seller at 13 keys, 17 keys, are (at the very least) new:

https://i.imgur.com/74svcZp.jpg

14 keys unsold for at least a day:

calling 14 high,

7 low,

taking range of bulk of sales,

10 - 13 keys.