Resuggestion, thanks to polar for the info!

Sale 1:

https://backpack.tf/profiles/76561198847680167#!/compare/1543622400/1543708800

https://backpack.tf/profiles/76561198162120088#!/compare/1543622400/1543708800

Bulk

Sale 2:

https://backpack.tf/profiles/76561198000889832#!/compare/1546128000/1546214400

https://backpack.tf/profiles/76561198103514638#!/compare/1546128000/1546214400

Sold with 15 keys for Orb Punk + negligible sweets

use there.

Sale 3:

https://backpack.tf/profiles/76561198103514638#!/compare/1546387200/1546473600

Sold with 16 keys for flies Crone(40)

Total is 24 keys

Sale 4:

https://backpack.tf/profiles/76561198435006502#!/compare/1542240000/1542326400

https://backpack.tf/profiles/76561198213826044#!/compare/1542067200/1542326400

Untrace

Sale 5:

https://backpack.tf/profiles/76561198435006502#!/compare/1542240000/1542326400

https://backpack.tf/profiles/76561198213826044#!/compare/1542326400/1542412800

Untrace

Sale 6:

https://backpack.tf/profiles/76561198213826044#!/compare/1542326400/1542412800

Sold with ~12 keys in sweets for Stormy Neckwear

Neckwear Mini:

https://backpack.tf/suggestion/5c1c8aaf44325a19ed214fd9

Suggestion for 34 keys

Total is 22 keys

Sale 7:

https://backpack.tf/profiles/76561198164036774#!/compare/1542240000/1542326400

https://backpack.tf/profiles/76561198093899544#!/compare/1542240000/1542326400

Sold for 21 keys

Sale 8:

https://backpack.tf/profiles/76561198093899544#!/compare/1542499200/1542585600

https://backpack.tf/profiles/76561198266876790#!/compare/1542412800/1542499200

Sold for Steaming Warhood + 3 keys

Warhood sold quickly for ~13 keys, taking that.

Total is 16 keys

Sale 9:

https://backpack.tf/profiles/76561198266876790#!/compare/1542412800/1542499200

https://backpack.tf/profiles/76561198101327173#!/compare/1542412800/1542499200

Sold with 17 keys for Pe Thirst Blood(51)

Total is 34 keys

Sale 10:

https://backpack.tf/profiles/76561198018719204#!/compare/1538956800/1539043200

https://backpack.tf/profiles/76561198121385547#!/compare/1538870400/1538956800

https://backpack.tf/profiles/76561198150761253#!/compare/1538784000/1538956800

https://backpack.tf/profiles/76561198075774444#!/compare/1538870400/1538956800

Untrace

Sale 11:

https://backpack.tf/profiles/76561198075774444#!/compare/1538956800/1539043200

https://backpack.tf/profiles/76561198063905981#!/compare/1538784000/1539043200

Sold for ~20 keys

Sale 12:

https://backpack.tf/profiles/76561198046022683#!/compare/1543622400/1543708800

https://backpack.tf/profiles/76561198296439158#!/compare/1543622400/1543708800

Transfer?

Sale 13:

https://backpack.tf/profiles/76561198197481041#!/compare/1544054400/1545350400

Transfer?

Sale 14:

https://backpack.tf/profiles/76561198026129220#!/compare/1545264000/1545350400

Untrace

Sale 15 - 18:

https://marketplace.tf/items/139;5;u6

Sold for 45, 39.99, 43.9, 27.6 USD

Keys at 1.8, 1.71, 1.71, 1.65 USD

Totals are 25, 23.39, 25.67, 16.73 keys

Total sales @:

16, 16.73, 20, 21, 22, 23.39, 24, 25, 25.67, 34 keys

Buyers up to 18 keys

Buyer at 22 sold successfully,

https://backpack.tf/profiles/76561198076057806#!/compare/1547251200/1547337600

https://backpack.tf/profiles/76561198448364970#!/compare/1547337600/1547596800

Sellers down to 24 now

Polar's Part:

Your are excluding more sales than you are including. I would probably go 20-24 here.