Sale 1:

https://backpack.tf/profiles/76561198165363447#!/compare/1553558400/1553644800

https://backpack.tf/profiles/76561198042938501#!/compare/1553558400/1553644800

Sold for ~13 keys

Sale 2:

https://backpack.tf/profiles/76561198042938501#!/compare/1553731200/1553817600

https://backpack.tf/profiles/76561198410099666#!/compare/1553731200/1553817600

Sold for ~14 keys

Sale 3:

https://backpack.tf/profiles/76561198410099666#!/compare/1554940800/1555027200

https://backpack.tf/profiles/76561198075998447#!/compare/1554940800/1555027200

Sold for ~15 keys

Sale 4:

https://backpack.tf/profiles/76561198075998447#!/compare/1556928000/1557273600

https://backpack.tf/profiles/76561198103593064#!/compare/1543881600/1557273600

Untrace

Sale 5:

https://backpack.tf/profiles/76561198250295930#!/compare/1555372800/1555545600

https://backpack.tf/profiles/76561198006544512#!/compare/1555459200/1555545600

QS

Sale 6:

https://backpack.tf/profiles/76561198050518375#!/compare/1550448000/1550534400

https://backpack.tf/profiles/76561198080179568#!/compare/1550448000/1550534400

QS?

Sale 7:

https://backpack.tf/profiles/76561198080179568#!/compare/1556928000/1557014400

https://backpack.tf/profiles/76561198164512690#!/compare/1556668800/1557014400

Sold for 14 keys

Sale 8:

https://backpack.tf/profiles/76561198341945901#!/compare/1553817600/1553904000

https://backpack.tf/profiles/76561198180052906#!/compare/1553385600/1553904000

Sold for 9 keys

Sale 9:

https://backpack.tf/profiles/76561198180052906#!/compare/1553385600/1553904000

https://backpack.tf/profiles/76561198071920700#!/compare/1553817600/1553904000

Sold for Blizzardy Mullet(9) + ~4 keys

Total is 13 keys

Sale 10:

https://backpack.tf/profiles/76561198071920700#!/compare/1553990400/1554076800

https://backpack.tf/profiles/76561198132527164#!/compare/1553990400/1554076800

Bulk

Sale 11:

https://backpack.tf/profiles/76561198132527164#!/compare/1554076800/1554163200

https://backpack.tf/profiles/76561198345788867#!/compare/1553904000/1554163200

Sold with negligible sweets for Stormy Blast(15)

Sale 12:

https://backpack.tf/profiles/76561198345788867#!/compare/1553904000/1554163200

https://backpack.tf/profiles/76561198093330769#!/compare/1554076800/1554163200

Sold for Steaming Havenplane

Use there

Sale 13:

https://backpack.tf/profiles/76561198868641396#!/compare/1554854400/1554940800

https://backpack.tf/profiles/76561198165770364#!/compare/1554768000/1555372800

Untrace

Sale 14:

https://backpack.tf/profiles/76561198165770364#!/compare/1555372800/1555545600

https://backpack.tf/profiles/76561198304911264#!/compare/1554940800/1555718400

Untrace

Sale 15:

https://backpack.tf/profiles/76561198304911264#!/compare/1555891200/1556064000

https://backpack.tf/profiles/76561198154211785#!/compare/1555891200/1556064000

uhhhhh, bulky??

Sale 16:

https://backpack.tf/profiles/76561198154211785#!/compare/1556064000/1556150400

https://backpack.tf/profiles/76561198342955198#!/compare/1556064000/1556150400

Untrace

Sale 17:

https://backpack.tf/profiles/76561198342955198#!/compare/1556064000/1556150400

https://backpack.tf/profiles/76561198277409359#!/compare/1556064000/1556150400

Bulky

Sale 18:

https://marketplace.tf/items/465;5;u33

$35.99 / $1.8 = 19.99 keys

Total sales @:

9, 13, 13, 14, 14, 15, 15, 19.99 keys

Sellers down to 14 keys,

Seller at 15 been there for months.

Buyers up to ~12.5 keys

Taking 13 - 15, conserving unsolds in range.