Sale 1:

https://backpack.tf/profiles/76561198109986831#!/compare/1547251200/1547510400

https://backpack.tf/profiles/76561198075325715#!/compare/1547424000/1547510400

Sold for N&B Mining Light + 1 key

Use there

Sale 2:

https://backpack.tf/profiles/76561198075325715#!/compare/1547510400/1547596800

https://backpack.tf/profiles/76561198085931736#!/compare/1547510400/1547596800

Sold for Max Head(21)

Sale 3:

https://backpack.tf/profiles/76561198085931736#!/compare/1548633600/1548720000

https://backpack.tf/profiles/76561198418740133#!/compare/1548633600/1548720000

Bulk

Sale 4:

https://backpack.tf/profiles/76561198418740133#!/compare/1552003200/1552089600

https://backpack.tf/profiles/76561198137277576#!/compare/1551830400/1552089600

Sold for DP Exec + 5 keys

Exec Mini:

https://backpack.tf/suggestion/5cb23c7cd381723b1f470053

Suggestion for 22.5 keys

Total is 27.5 keys

Sale 5:

https://backpack.tf/profiles/76561198137277576#!/compare/1552176000/1552780800

https://backpack.tf/profiles/76561198148836514#!/compare/1552694400/1552780800

Sold for ~19 keys

Sale 6:

https://backpack.tf/profiles/76561198148836514#!/compare/1552780800/1552867200

https://backpack.tf/profiles/76561198809414908#!/compare/1552780800/1552867200

Sold for Steaming Bonk + 1 key

Bonk Mini:

https://backpack.tf/suggestion/5cb17f4ed3817232463a56c8

Suggestion for 29 keys

Total is 30 keys

Sale 7:

https://backpack.tf/profiles/76561198809414908#!/compare/1552867200/1552953600

https://backpack.tf/profiles/76561198449307015#!/compare/1552780800/1552867200

Untrace

Sale 8:

https://backpack.tf/profiles/76561198449307015#!/compare/1553126400/1553299200

https://backpack.tf/profiles/76561198355520251#!/compare/1553212800/1553299200

low????

Sale 9:

https://backpack.tf/profiles/76561198355520251#!/compare/1553558400/1553644800

https://backpack.tf/profiles/76561198198896481#!/compare/1553558400/1553644800

Sold for ~21 keys

Total sales @:

19, 21, 21, 27.5, 30 keys

Sellers down to 24 keys,

buyers up to 20 keys,

gonna call 19 low, 30 high,

preserve range close to unsold,

taking 21 - 28 keys.