Sale 1:

https://backpack.tf/profiles/76561198873106287#!/compare/1561075200/1590364800

https://backpack.tf/profiles/76561198052194031#!/compare/1590278400/1590364800

Sold with ~5 keys in sweets for Bubbling Pillar

use there

sale 2:

https://backpack.tf/profiles/76561198052194031#!/compare/1590278400/1590364800

https://backpack.tf/profiles/76561198980897882#!/compare/1590019200/1590364800

Sold with ~4.5 keys in sweets for 11 keys

Total is 6.5 keys

Sale 3:

https://backpack.tf/profiles/76561198980897882#!/compare/1590019200/1590364800

https://backpack.tf/profiles/76561198101915413#!/compare/1590278400/1590364800

Sold with ~4.5 keys in sweets for C9 Pith

Bulky / low

sale 4:

https://backpack.tf/profiles/76561198101915413#!/compare/1590624000/1590710400

https://backpack.tf/profiles/76561198220471793#!/compare/1590105600/1591401600

untrace

sale 5:

https://backpack.tf/profiles/76561198220471793#!/compare/1591401600/1594598400

https://backpack.tf/profiles/76561198846470235#!/compare/1591574400/1591747200

SCM

sale 6:

https://backpack.tf/profiles/76561198847055779#!/compare/1589932800/1590019200

https://backpack.tf/profiles/76561198979211418#!/compare/1589932800/1590019200

Untrace

sale 7:

https://backpack.tf/profiles/76561198979211418#!/compare/1594080000/1596672000

https://backpack.tf/profiles/76561198876179362#!/compare/1593993600/1594080000

Untrace / Bulk

Sale 8:

https://backpack.tf/profiles/76561198048851745#!/compare/1593129600/1593216000

https://backpack.tf/profiles/76561198382290208#!/compare/1593043200/1593129600

Sold for ~6.5 keys

Sale 9:

https://backpack.tf/profiles/76561198382290208#!/compare/1593129600/1593216000

https://backpack.tf/profiles/76561198210225228#!/compare/1592956800/1593216000

Transfer

Sale 10:

https://marketplace.tf/items/tf2/603;5;u34

$12 / $1.98 = 6.06 keys

$14.99 / $2.05 = 7.31 keys <--- https://backpack.tf/item/526411090

Total sales @:

6, 6.5, 6.5, 7.5 keys

buyers up to ~6.48 keys,

years unsold for 9 keys,

4 sellers on SCM:

https://steamcommunity.com/market/listings/440/Unusual%20Outdoorsman

27.16 / 3.36 = 8.08 keys

27.72 / 3.36 = 8.25 keys

26.85 / 3.36 = 7.99 keys

29.50 / 3.36 = 8.77 keys

calling 6 low,

nothing points to 7.5 being excluded,

taking 6.5 - 7.5 keys.