Sale 1:

https://backpack.tf/profiles/76561198073862303#!/compare/1584403200/1585612800

https://backpack.tf/profiles/76561198453530349#!/compare/1585612800/1585699200

Untrace

sale 2:

https://backpack.tf/profiles/76561198100538734#!/compare/1584144000/1586217600

https://backpack.tf/profiles/76561198054270952#!/compare/1586044800/1586217600

bulk

sale 3:

https://backpack.tf/profiles/76561198080179568#!/compare/1581811200/1581897600

https://backpack.tf/profiles/76561198143501691#!/compare/1581811200/1582070400

Untrace/ keys

sale 4:

https://backpack.tf/profiles/76561198143501691#!/compare/1582243200/1584230400

https://backpack.tf/profiles/76561198968281982#!/compare/1582329600/1582502400

Untrace

sale 5:

https://backpack.tf/profiles/76561198968281982#!/compare/1582329600/1582502400

https://backpack.tf/profiles/76561198337734785#!/compare/1582243200/1582329600

QS

sale 6:

https://backpack.tf/profiles/76561198337734785#!/compare/1588464000/1588550400

https://backpack.tf/profiles/76561198020673987#!/compare/1588464000/1588550400

https://backpack.tf/profiles/76561198850274253#!/compare/1589241600/1589155200

Untrace / keys / QS

sale 7:

https://backpack.tf/profiles/76561198021272428#!/compare/1583020800/1583193600

https://backpack.tf/profiles/76561198263721555#!/compare/1583280000/1583884800

SCM

sale 8:

https://backpack.tf/profiles/76561198142864294#!/compare/1581811200/1581897600

https://backpack.tf/profiles/76561198096256297#!/compare/1581724800/1581897600

Sold with 1 key for N&B HTKF

use there

sale 9:

https://backpack.tf/profiles/76561198096256297#!/compare/1582070400/1583020800

https://backpack.tf/profiles/76561198811524972#!/compare/1582588800/1582675200

Sold for 9 keys + spell

Spell Mini:

https://backpack.tf/profiles/76561198074043822#!/compare/1582502400/1582588800

https://backpack.tf/profiles/76561198158094852#!/compare/1582329600/1582588800

sold for 6 keys

https://backpack.tf/profiles/76561198158094852#!/compare/1582588800/1582675200

https://backpack.tf/profiles/76561198811524972#!/compare/1582588800/1582675200

Sold for 2 keys

https://backpack.tf/profiles/76561198096256297#!/compare/1583625600/1583798400

https://backpack.tf/profiles/76561198200420351#!/compare/1583712000/1583798400

Sold for ~2 keys

taking ~2 keys, calling 6 high.

Total is ~11 keys

sale 10:

https://backpack.tf/profiles/76561198811524972#!/compare/1582675200/1582761600

https://backpack.tf/profiles/76561198080179568#!/compare/1582588800/1582675200

QS

sale 11:

https://backpack.tf/profiles/76561198080179568#!/compare/1588636800/1588723200

https://backpack.tf/profiles/76561198424596993#!/compare/1587859200/1588723200

Sold for ~7.5 keys

sale 12:

https://backpack.tf/profiles/76561198424596993#!/compare/1588896000/1588982400

https://backpack.tf/profiles/76561198974703657#!/compare/1588809600/1588896000

Bulky

sale 13:

https://backpack.tf/profiles/76561198974703657#!/compare/1588896000/1589068800

https://backpack.tf/profiles/76561198280169836#!/compare/1552348800/1589068800

Sold for 8 keys

sale 14:

https://backpack.tf/profiles/76561198280169836#!/compare/1552348800/1589068800

https://backpack.tf/profiles/76561198110248446#!/compare/1588896000/1589068800

sold with ~2 keys in sweets for Aces Pompadour

Pomp mini:

https://backpack.tf/suggestion/5ebda75c01973924984408d7

Suggestion for 11.5 keys

Total is 9.5 keys

sale 15:

https://marketplace.tf/items/tf2/250;5;u60

$24.49 / $1.69 = 14.49 keys

Total sales @:

7.5, 8, 9.5, 11, 14 keys

buyers up to 7.5 keys,

seller at 9 keys, new,

calling 7.5 low,

14 high,

taking 8 - 11 keys.