Sale 1:

https://backpack.tf/profiles/76561198066329143#!/compare/1567123200/1569024000

https://backpack.tf/profiles/76561198412842501#!/compare/1568505600/1568678400

SCM

Sale 2:

https://backpack.tf/profiles/76561198098071282#!/compare/1567036800/1567814400

https://backpack.tf/profiles/76561198036144976#!/compare/1568160000/1568246400

https://backpack.tf/profiles/76561198838447026#!/compare/1568160000/1568246400

Untrace

Sale 3:

https://backpack.tf/profiles/76561198838447026#!/compare/1568246400/1568332800

https://backpack.tf/profiles/76561198142957952#!/compare/1568246400/1568332800

Keys

sale 4:

https://backpack.tf/profiles/76561198340634356#!/compare/1564876800/1564963200

https://backpack.tf/profiles/76561198971152948#!/compare/1564876800/1564963200

Keys

sale 5:

https://backpack.tf/profiles/76561198971152948#!/compare/1565049600/1565136000

https://backpack.tf/profiles/76561198138084551#!/compare/1564704000/1565136000

Untrace

Sale 6:

https://backpack.tf/profiles/76561198138084551#!/compare/1565913600/1566000000

https://backpack.tf/profiles/76561198155558267#!/compare/1565913600/1566000000

Bulk

sale 7:

https://backpack.tf/profiles/76561198050712972#!/compare/1568332800/1568419200

https://backpack.tf/profiles/76561198153088409#!/compare/1568332800/1568419200

Bulk

Sale 8:

https://backpack.tf/profiles/76561198204929705#!/compare/1565395200/1565481600

https://backpack.tf/profiles/76561198334598690#!/compare/1565395200/1565481600

QS

sale 9:

https://backpack.tf/profiles/76561198226348064#!/compare/1558396800/1564704000

https://backpack.tf/profiles/76561198848072512#!/compare/1566950400/1567382400

SCM

Sale 10 - 14:

https://marketplace.tf/items/tf2/1108;5;u3001

$9.64 / $1.85 = 5.21 keys

$9.64 / $1.83 = 5.27 keys

$9.5 / $1.83 = 5.19 keys

$5 / $1.83 = 2.73 keys

$9.33 / $1.83 = 5.10 keys <-- https://backpack.tf/item/7570347046 | https://bot.tf/stats/listings/4EEZ0PW6 B/O of 5 keys

Sale 15:

https://backpack.tf/profiles/76561198021055079#!/compare/1562371200/1562457600

https://backpack.tf/profiles/76561198121883901#!/compare/1561766400/1562544000

Sold for ~3.35 keys in sweets

Sale 16:

https://backpack.tf/profiles/76561198848712429#!/compare/1561680000/1568073600

https://backpack.tf/profiles/76561198094059122#!/compare/1559347200/1563926400

Bulk

Bot.tf:

https://bot.tf/stats/item?def=1108&q=5&ef=Showstopper&craft=1&aus=0&ks=0&source=browser_script

2 sale @ 3.15 keys,

1 sale 2.75 keys,

1 sale @ 2.85 keys,

1 sale @ 3.05 keys,

1 sale @ 3.40 keys,

2 sale @ 3.25 keys,

1 sale @ 3.20 keys,

1 sale @ 3.80 keys,

1 sale @ 3.35 keys

Total sales @:

2.75 (x2)

2.85

3.05

3.15

3.20

3.25

3.35 (x2)

3.40

3.80

5

5.2(x2)

5.25

buyers up to ~3.20 keys,

aging seller for 4 keys...

https://bot.tf/stats/listings/Y5RNQ9D7

unsolds at ~5.25 keys...

gonna call under 3.20 low,

taking 3.2 - 5.2 keys, cutting 5.25 out to somewhat balance and conserve closer to aging unsold.