Sale 1:

https://backpack.tf/item/7588197244

nope.

Sale 2:

https://backpack.tf/profiles/76561198073553007#!/compare/1555286400/1555372800

https://backpack.tf/profiles/76561198341171690#!/compare/1555286400/1555372800

QS?

Sale 3:

https://backpack.tf/profiles/76561198341171690#!/compare/1556064000/1556150400

https://backpack.tf/profiles/76561198138667312#!/compare/1556064000/1556150400

Sold for 8 keys

Sale 4:

https://backpack.tf/profiles/76561198138667312#!/compare/1556236800/1556323200

https://backpack.tf/profiles/76561198125894529#!/compare/1556236800/1556323200

Sold for OF Buddy + 1 key

Buddy Mini:

https://backpack.tf/suggestion/5cd789a76780723181231491

Suggestion for 9.25 keys

Total is 10.25 keys

Sale 5:

https://backpack.tf/profiles/76561198125894529#!/compare/1556409600/1556496000

https://backpack.tf/profiles/76561198308606946#!/compare/1556409600/1556496000

Sold with 4 keys for Searing Halogen

Halogen Mini:

https://backpack.tf/suggestion/5cd8d607d381727599602f7a

Suggestion for 17.5 keys

Total is 13.5 keys

Sale 6:

https://backpack.tf/profiles/76561198308606946#!/compare/1556496000/1556582400

https://backpack.tf/profiles/76561198021055079#!/compare/1556496000/1556582400

Sold for KaW Mullet

Use there

Sale 7:

https://backpack.tf/profiles/76561198097137448#!/compare/1550275200/1550793600

https://backpack.tf/profiles/76561198072799700#!/compare/1550275200/1551744000

Untrace

Sale 8:

https://backpack.tf/profiles/76561198823680454#!/compare/1550102400/1550361600

https://backpack.tf/profiles/76561198353801289#!/compare/1550275200/1550361600

Low amount of sweets

sale 9:

https://backpack.tf/profiles/76561198353801289#!/compare/1550275200/1550361600

https://backpack.tf/profiles/76561198418104412#!/compare/1550275200/1550361600

Sold for ~11 keys

Sale 10:

https://backpack.tf/profiles/76561198418104412#!/compare/1550361600/1550448000

https://backpack.tf/profiles/76561198059098316#!/compare/1550361600/1550448000

Sold for 16 keys

Sale 11:

https://backpack.tf/profiles/76561198097770122#!/compare/1548892800/1553904000

https://backpack.tf/profiles/76561198059098316#!/compare/1553817600/1553904000

Can't fully trace, at least 5 keys...

Total sales @:

8, 10.25, 11, 13.5, 16 keys

Seller for 17 keys,

Buyers up to 10 keys,

Gonna take 11 - 16 keys