Sale 1:

https://backpack.tf/profiles/76561197988087471#!/compare/1538179200/1538265600

https://backpack.tf/profiles/76561197966756586#!/compare/1538179200/1538265600

BP buy

Sale 2:

https://backpack.tf/profiles/76561198376965703#!/compare/1535155200/1538524800

https://backpack.tf/profiles/76561198021055079#!/compare/1538352000/1538438400

Sold for Stormy Caribou(26.5)

Sale 3:

https://backpack.tf/profiles/76561198312583107#!/compare/1534118400/1534204800

https://backpack.tf/profiles/76561198850161080#!/compare/1534118400/1534204800

Sold for Aussie Rifle(~22) + 3 keys

Total is 25 keys

Sale 4:

https://backpack.tf/profiles/76561198812788964#!/compare/1535673600/1535846400

https://backpack.tf/profiles/76561198108397345#!/compare/1535760000/1535932800

Sold for Max Head + Bills hat

Total is 21 keys

Sale 5:

https://backpack.tf/profiles/76561198030113816#!/compare/1536451200/1536537600

https://backpack.tf/profiles/76561198065711566#!/compare/1536364800/1536451200

Sold for 26 keys

Sale 6:

https://backpack.tf/profiles/76561198125791160#!/compare/1536796800/1536883200

https://backpack.tf/profiles/76561198421240889#!/compare/1536796800/1536883200

Sold for 18 keys + Aussie Frontier Justice(10)

Total is 28 keys

Sale 7:

https://backpack.tf/profiles/76561198080179568#!/compare/1535760000/1535846400

https://backpack.tf/profiles/76561198177908233#!/compare/1535673600/1535846400

Untrace.

Sale 8:

https://backpack.tf/profiles/76561198134655498#!/compare/1533600000/1533945600

https://backpack.tf/profiles/76561198038606791#!/compare/1535068800/1535155200

Untrace.

Sale 9:

https://backpack.tf/profiles/76561198209505537#!/compare/1535155200/1535241600

https://backpack.tf/profiles/76561198067663328#!/compare/1535155200/1535241600

Low.

Sale 10:

https://backpack.tf/profiles/76561198067663328#!/compare/1535241600/1535328000

https://backpack.tf/profiles/76561198307761034#!/compare/1535241600/1535328000

Can only 4 keys

Sale 11:

https://backpack.tf/profiles/76561198307761034#!/compare/1535241600/1535328000

https://backpack.tf/profiles/76561198166870155#!/compare/1535241600/1535328000

Sold for Overclocked Jefe(21) (ID Match)

Sale 12:

https://backpack.tf/profiles/76561198080179568#!/compare/1535328000/1535500800

https://backpack.tf/profiles/76561198160644852#!/compare/1535500800/1535587200

Sold for 26 keys (ID Match)

Sale 13:

https://backpack.tf/profiles/76561198311498888#!/compare/1534377600/1534464000

https://backpack.tf/profiles/76561198123734020#!/compare/1534377600/1534550400

Untrace.

Sale 14:

https://backpack.tf/profiles/76561198123734020#!/compare/1534550400/1534636800

https://backpack.tf/profiles/76561198177105083#!/compare/1534636800/1534723200

Can trace a Machina

Sale 15:

https://backpack.tf/profiles/76561198177105083#!/compare/1534636800/1534723200

https://backpack.tf/profiles/76561198061275415#!/compare/1534636800/1534723200

Sold for 24 keys

Sale 16:

https://backpack.tf/profiles/76561198061275415#!/compare/1535155200/1535241600

https://backpack.tf/profiles/76561198192454075#!/compare/1535241600/1537401600

Sold for 25 keys (may need to recount)

Sale 17:

https://backpack.tf/profiles/76561198396322888#!/compare/1534118400/1534204800

Untrace.

Sale 18:

https://backpack.tf/profiles/76561198848985609#!/compare/1537574400/1537660800

Untrace

Sale 19:

https://backpack.tf/profiles/76561198170859755#!/compare/1533513600/1533600000

https://backpack.tf/profiles/76561198410407173#!/compare/1533340800/1533513600

Untrace.

Sale 20:

https://backpack.tf/profiles/76561198410407173#!/compare/1534291200/1534550400

https://backpack.tf/profiles/76561198080179568#!/compare/1534377600/1534464000

Bulk?

Sale 21:

https://backpack.tf/profiles/76561198080179568#!/compare/1535241600/1535328000

https://backpack.tf/profiles/76561198403132881#!/compare/1534723200/1535846400

Sold for 15 keys?

Sale 22:

https://backpack.tf/profiles/76561198403132881#!/compare/1535846400/1536019200

https://backpack.tf/profiles/76561198833467557#!/compare/1535932800/1536019200

Untrace

Sale 23:

https://backpack.tf/profiles/76561198311498888#!/compare/1536710400/1536796800

https://backpack.tf/profiles/76561198203972417#!/compare/1535241600/1537056000

Untrace.

Sale 24:

https://backpack.tf/profiles/76561198203972417#!/compare/1537142400/1537228800

https://backpack.tf/profiles/76561198056876856#!/compare/1537056000/1537142400

Sold for Strange Miami Caribou

Use there.

Sale 25:

https://backpack.tf/profiles/76561198056876856#!/compare/1537228800/1537315200

https://backpack.tf/profiles/76561198278683748#!/compare/1537142400/1537315200

Sold for 21 keys

Sale 26:

https://backpack.tf/profiles/76561198278683748#!/compare/1537401600/1537488000

https://backpack.tf/profiles/76561198095961536#!/compare/1537401600/1537488000

High / use there

Sale 27:

https://backpack.tf/profiles/76561198095961536#!/compare/1537488000/1537660800

https://backpack.tf/profiles/76561198351539655#!/compare/1537315200/1537574400

Sold for HG Brass Bucket(33)

Sale 28, 29:

https://marketplace.tf/items/30810;5;u108

Sold for 59.99, 49.99 USD

keys at 1.89, 1.83 USD

Totals are 31.74, 27.32 keys

Total sales @:

15, 21, 21, 21, 24, 25, 25, 26, 26, 26.5, 27.32, 28, 31.74, 33 keys

https://i.imgur.com/qh8LQGz.jpg

Buyers up to 23 keys

Sellers down to 27 keys, 30 keys. both young.

Due to quickness of 24, and lower and higher sales,

Let's go with 25 - 28 keys