Well, this is took longer then expected....

Sale #1 - Sold with 5~ keys worth of adds For A Scorching Airdog

https://backpack.tf/profiles/76561198089253101#!/compare/1542499200/1542585600

https://backpack.tf/profiles/76561198170220043#!/compare/1542326400/1542585600

Taking - 40 - 5 = 35 keys

Airdog mini - https://marketplace.tf/items/30767;5;u14

Sale #1 69.98 / 1.76 = 39.76 / rounded to 40

Sale #2 69.99 / 1.75 = 39.99 / rounded to 40

Taking 40 for the airdog

Sale #2 - 1 for 1 with gbh fr-0

https://backpack.tf/profiles/76561198089253101#!/compare/1543017600/1543104000

https://backpack.tf/profiles/76561198394965271#!/compare/1542931200/1543017600

Taking 45 keys

Sale #3 - Quicksale

https://backpack.tf/profiles/76561198105321885#!/compare/1543622400/1543795200

https://backpack.tf/profiles/76561198394965271#!/compare/1543708800/1543795200

Sale #4 - 1 for 1 with a terror watt hunter in darkness

https://backpack.tf/profiles/76561198121386755#!/compare/1544659200/1544832000

https://backpack.tf/profiles/76561198067575136#!/compare/1544572800/1544745600

Using there

Sale #5 - Sold For A HG Brigade + PFetti Woodsman

https://backpack.tf/profiles/76561198179707937#!/compare/1539388800/1539475200

https://backpack.tf/profiles/76561198080041017#!/compare/1539475200/1539820800

Taking 27 + ? = ?

Brigade Micro - 27 keys

https://backpack.tf/profiles/76561198046921199#!/compare/1544832000/1544918400

(buyer got keys from beardman and instantly used them to buy the hat, buyer sold a ausi

rl for the keys - https://backpack.tf/profiles/76561198218193897#!/compare/1544832000/1544918400 )

Woodsman Micro

Only Traceable micro is high.... https://marketplace.tf/items/30549;5;u7

52 / 1.65 = 31.5 keys, rounded to 32

I would take 32 keys, but due to unsold for 4 months at 28, that would mean that this is high....

https://imgur.com/a/35v5Xn8

Sale #6 - 25 keys (quicksale) (counted id's)

https://backpack.tf/profiles/76561198089253101#!/compare/1543536000/1543622400

https://backpack.tf/profiles/76561198080041017#!/compare/1542412800/1543622400

Sale #7 - Untrace

https://backpack.tf/profiles/76561198089253101#!/compare/1543881600/1543968000

https://backpack.tf/profiles/76561198136240234#!/compare/1543881600/1543968000

Sale #8 - Bulk

https://backpack.tf/profiles/76561198192602363#!/compare/1544227200/1544313600

https://backpack.tf/profiles/76561198136240234#!/compare/1544313600/1544486400

Excluding / Reason

Sale #3 / quicksale

Sale #4 / Using there

Sale #5 / No Valid mini was found

Sale #6 / quicksale

Sale #7 / Untrace

Sale #8 / Bulk

Using Sale

Sale #1 @ 35 keys

Sale #2 @ 45 keys

Overall Taking 35 - 45 keys.