Mini train, car 4. choo choo.

Sale 1:

https://backpack.tf/profiles/76561198164296876#!/compare/1529452800/1529539200

Cash out.

Sale 2:

https://backpack.tf/profiles/76561198091815709#!/compare/1533168000/1533254400

https://backpack.tf/profiles/76561198297177016#!/compare/1532822400/1533254400

Sold for 22 keys (Went to Sujak)

Sale 3:

https://backpack.tf/profiles/76561198297177016#!/compare/1533340800/1533427200

https://backpack.tf/profiles/76561198311274116#!/compare/1533340800/1533427200

Sold for Smoking Outta' Sight(17.5) + 4 keys + ~2 keys in sweets

Total is 23.5 keys

Sale 4:

https://backpack.tf/profiles/76561198311274116#!/compare/1533686400/1533772800

https://backpack.tf/profiles/76561198064589227#!/compare/1533686400/1533772800

Sold with ~1 key in sweets for HG Elfin Deal

https://i.imgur.com/SPJdL91.png

B/O of 25 keys

Use there.

Sale 5:

https://backpack.tf/profiles/76561198318138402#!/compare/1533772800/1533859200

Untrace.

Sale 6:

https://marketplace.tf/items/602;5;u108;strange

Sold for 49.99 USD

Keys at 1.93 USD

Total is 25.90 keys

Sale 7:

https://backpack.tf/profiles/76561197993157409#!/compare/1533254400/1533686400

https://backpack.tf/profiles/76561198088391137#!/compare/1533513600/1533600000

Bulk.

Sale 8:

https://backpack.tf/profiles/76561198088391137#!/compare/1533513600/1533600000

https://backpack.tf/profiles/76561198346664888#!/compare/1533600000/1533686400

Sold for Strange Potassium Bonnet(~27)

Sale 9:

https://backpack.tf/profiles/76561198346664888#!/compare/1533772800/1533859200

https://backpack.tf/profiles/76561198108650109#!/compare/1533772800/1533859200

Untrace.

https://i.imgur.com/TCuj3Ij.png

B/O of 22 keys

Total sales @:

22, 23.5, 25.9, 27

Buyers up to 18 keys

Seller for 35 keys

https://i.imgur.com/16AdKpY.png

https://backpack.tf/item/5219540589

Considering solds with low B/O and high B/O,

AND that non-Strange has a low end range of 23,

Calling 22 an outlier,

Taking 24- 27 keys