Sale 1:

https://backpack.tf/profiles/76561198021055079#!/compare/1560556800/1560643200

https://backpack.tf/profiles/76561198145567624#!/compare/1560556800/1560643200

https://bot.tf/stats/listings/MGVJE9ZM

Sold for 17 keys

Sale 2:

https://backpack.tf/profiles/76561198056176130#!/compare/1560211200/1560470400

https://backpack.tf/profiles/76561198802465612#!/compare/1560384000/1560470400

Sold for ~13 Keys

Sale 3:

https://backpack.tf/profiles/76561198802465612#!/compare/1561334400/1561420800

https://backpack.tf/profiles/76561198836967499#!/compare/1561334400/1561420800

Keys, can't accurately tell how many.

Sale 4:

https://backpack.tf/profiles/76561198103050565#!/compare/1559088000/1559606400

https://backpack.tf/profiles/76561198089747205#!/compare/1554508800/1560729600

Untrace

Sale 5:

https://backpack.tf/profiles/76561198143613491#!/compare/1562112000/1566000000

https://backpack.tf/profiles/76561198418740133#!/compare/1565654400/1565913600

Bulky / low

Sale 6:

https://backpack.tf/profiles/76561198031743044#!/compare/1559088000/1559174400

https://backpack.tf/profiles/76561198386189638#!/compare/1559088000/1559174400

Sold for 14 keys

Sale 7:

https://backpack.tf/profiles/76561198386189638#!/compare/1559174400/1559260800

https://backpack.tf/profiles/76561198277409359#!/compare/1559174400/1559260800

Sold with 6 keys for CH Blast

Use there

Sale 8:

https://backpack.tf/profiles/76561198277409359#!/compare/1559174400/1559260800

https://backpack.tf/profiles/76561198318521969#!/compare/1559174400/1559260800

Sold for Steaming Tree

Tree Mini:

https://backpack.tf/suggestion/5d620263d38172247d54d742

Suggestion for 13.5 keys

Sale 9:

https://backpack.tf/profiles/76561198318521969#!/compare/1559260800/1559347200

https://backpack.tf/profiles/76561198157452762#!/compare/1559174400/1559260800

Sold with 1 key for Voltaic Trans + Grail Posedown(6)

Trans Mini:

https://backpack.tf/suggestion/5d672e9d6780721d3b231abe

Suggestion for 14 keys

Total is 19 keys

Sale 10:

https://backpack.tf/profiles/76561198157452762#!/compare/1559520000/1559606400

https://backpack.tf/profiles/76561198347573909#!/compare/1559520000/1559606400

Bulk

Sale 11:

https://backpack.tf/profiles/76561198347573909#!/compare/1559520000/1559606400

https://backpack.tf/profiles/76561198180730062#!/compare/1559347200/1559606400

Bulky

Sale 12:

https://backpack.tf/profiles/76561198180730062#!/compare/1559606400/1559779200

https://backpack.tf/profiles/76561198140316312#!/compare/1559692800/1559779200

Bulk

Sale 13:

https://backpack.tf/profiles/76561198140316312#!/compare/1560211200/1560297600

https://backpack.tf/profiles/76561198056590708#!/compare/1560297600/1560384000

Sold with ~2 keys in sweets for DP Noble

use there

Sale 14:

https://backpack.tf/profiles/76561198056590708#!/compare/1563840000/1563926400

https://backpack.tf/profiles/76561198335791307#!/compare/1563840000/1563926400

Sold for ~10 keys

Sale 15:

https://marketplace.tf/items/tf2/30615;5;u3021

$28.29 / $1.82 = 15.54 keys

$23 / $1.81 = 12.71 keys

$23.02 / $1.84 = 12.51 keys

$22.3 / $1.82 = 12.25 keys

$21.5 / $1.83 = 11.75 keys

$24.44 / $1.83 = 13.36 keys <-- https://backpack.tf/item/4476736881

Total sales @:

10, 12, 12, 13 , 13, 13, 13, 13.5, 14, 16, 17, 19 keys

considering buyers at 10 around time of sale for 10 keys,

gonna call that low, calling 19 high to balance out,

taking 12 - 17 keys.