Let's see if this works...

Bot.tf: https://bot.tf/stats/item?def=851&q=11&ef=&craft=1&aus=0&ks=0 | https://imgur.com/a/3uZuRY2

General Sales:

More or less no real sales aside from these (that I could find)

Sale 1:

https://backpack.tf/item/5539033016

Sold for 7 keys

https://backpack.tf/profiles/76561198453530349#!/compare/1564099200/1564358400

https://backpack.tf/profiles/76561198107165710#!/compare/1564272000/1564358400

Sale 2:

https://backpack.tf/item/7957295890

Sold for 8 Keys

https://backpack.tf/profiles/76561198118954275#!/compare/1564704000/1565913600

https://backpack.tf/profiles/76561198155073647#!/compare/1565049600/1565913600

Sale 3:

https://backpack.tf/item/7956305002

Untraceable

https://backpack.tf/profiles/76561198389882677#!/compare/1564963200/1565136000

https://backpack.tf/profiles/76561198130713078#!/compare/1564617600/1566172800

Marketplace Sales:

https://marketplace.tf/items/tf2/851;11

Couldn't find histories for most.

Sale 4:

Sold on Aug 30th for $19.30, Keys were $1.82

10.6 Keys

Sale 5:

Sold on Aug 29th for $19.30, Keys were $1.82

10.6 Keys

Sale 6:

Sold on Aug 27th for $18.99, Keys were $1.82

10.4 Keys

Sale 7:

Sold on Aug 26th for $18.20, Keys were $1.83

9.95 Keys

Sale 8:

Sold on Aug 20th for $19.95, Keys were $1.84

10.8 Keys

Sale 9:

Sold on Aug 18th for $19.75, Keys were $1.84

10.7 Keys

Sale 10:

Sold on Aug 17th for $19.95, Keys were $1.83

10.9 Keys

Sale 11:

Sold on Aug 13th for $17.99 x2, Keys were $1.82

9.9 Keys

Sale 12:

Sold on Aug 12th for $17.44, Keys were $1.82

9.6 Keys

Sale 13:

Sold on Aug 11th for $17.27, Keys were $1.83

9.4 Keys

Sale 14:

Sold on Aug 10th for $16.1, Keys were $1.81

8.9 Keys

Sale 15:

https://backpack.tf/item/6264460175

Sold on Aug 9th for $15.9, Keys were $1.83

8.7 Keys

Sale 16:

Sold on Aug 8th for $15.71 x2, Keys were $1.82

8.6 Keys

Sale 17:

Sold on Aug 7th for $15.71 x2, Keys were $1.81

8.7 Keys

Sale 18:

Sold on Aug 6th for $15.87 x2, Keys were $1.84

8.6 Keys

Sale 19:

Sold on Aug 5th for $15.87 x2, Keys were $1.83

8.7 Keys

Sale 20:

Sold on Aug 4th for $16.03 x2, Keys were $1.84

8.7 Keys

Sale 21:

Sold on Aug 3rd for $15.71, Keys were $1.82

8.6 Keys

Sale 22:

Sold on Aug 2nd for $15.71, Keys were $1.81

8.7 Keys

Sale 23:

Sold on Aug 1st for $15.87, Keys were $1.8

8.8 Keys

Sale 24:

Sold on Jul 31st for $15.87 x3, Keys were $1.8

8.8 Keys

SCM Sales:

https://steamcommunity.com/market/listings/440/Strange%20AWPer%20Hand

Sale 25:

Sold on Sep 1st (3am) for $18.79, Keys were $2.36

8 Keys

Sale 26:

Sold on Sep 1st (10am) for $23.34, Keys were $2.33

10 Keys

Sale 27:

Sold on Sep 1st (1pm) for $23.34, Keys were $2.34

10 Keys

Sale 28:

Sold on Sep 1st (2pm) for $23.35, Keys were $2.34

10 Keys

Sale 29:

Sold on Sep 1st (6pm) for $23.12, Keys were $2.34

9.9 Keys

Sale 30:

Sold on Aug 30th (11am) for 23.27, Keys were $2.34

9.9 Keys

Sale 31:

Sold on Aug 29th (2am) for 21.50, Keys were $2.37

9.1 Keys

Sale 32:

Sold on Aug 28th (8am) for 23.42, Keys were $2.40

9.8 Keys

Sale 33:

Sold on Aug 27th (1pm) for 18.74, Keys were $2.40

7.8 Keys

Sale 34:

Sold on Aug 27th (11am) for 22.98, Keys were $2.38

9.65 Keys

Sale 35:

Sold on Aug 27th (7am) for 23, Keys were $2.37

9.7 Keys

Sale 36:

Sold on Aug 26th (1pm) for 23.32, Keys were $2.38

9.8 Keys

Sale 37:

Sold on Aug 26th (8am) for 18.97, Keys were $2.39

7.9 Keys

Sale 38:

Sold on Aug 25th (10pm) for 19.09, Keys were $2.41

7.9 Keys

Sale 39:

Sold on Aug 25th (9am) for 23.24, Keys were $2.33

10 Keys

Sale 40:

Sold on Aug 25th (3am) for 18.79, Keys were $2.39

7.9 Keys

Sale 41:

Sold on Aug 24th (7pm) for 19.55, Keys were $2.31

8.5 Keys

Sale 42:

Sold on Aug 24th (10am) for 23.49, Keys were $2.31

10.2 Keys

Sale 43:

Sold on Aug 24th (2am) for 18.89, Keys were $2.32

8.1 Keys

Summary of Sales:

1x 10.9

1x 10.8

1x 10.7

1x 10.9

2x 10.6

1x 10.4

1x 10.2

4x 10

1x 9.95

3x 9.9

2x 9.8

1x 9.7

1x 9.65

1x 9.6

1x 9.4

1x 9.1

1x 8.9

4x 8.8

8x 8.7

5x 8.6

1x 8.5

1x 8.1

2x 8

3x 7.9

1x 7.8

1x 7

Originally was going to go with 8.6 for the low end, but buyers are now around 8.63~

Going with 8.7-11 Keys, with 11 being a cap instead of 10 due to the handful of sales above 10 keys