Sale 1:

Sold for 12 keys

Seller: https://backpack.tf/profiles/76561198209640976#!/compare/1585094400/1585180800

Buyer: https://backpack.tf/profiles/76561198416760083#!/compare/1585094400/1585180800

https://backpack.tf/item/2463611209

12 keys

Sale 2:

Sold for 11 keys

Seller: https://backpack.tf/profiles/76561198355796365#!/compare/1591142400/1591228800

Buyer: https://backpack.tf/profiles/76561198098524288#!/compare/1590969600/1591401600

https://backpack.tf/item/7957317811

11 keys

Sale 3:

Sold for 8 keys + ~3 keys in items

Seller: https://backpack.tf/profiles/76561198097499917#!/compare/1590710400/1590796800

Buyer: https://backpack.tf/profiles/76561198081631436#!/compare/1590624000/1590796800

https://backpack.tf/item/2236844643

11 keys

Sale 4:

Sold with Dynamite Abs (~3) for Terror-Watt Noble (13)

Seller: https://backpack.tf/profiles/76561198098524288#!/compare/1591401600/1591574400

Buyer: https://backpack.tf/profiles/76561198850178158#!/compare/1591401600/1591488000

https://backpack.tf/item/7957317811

10 keys

Sale 5:

Sold for 9 keys + a small amount of ref

Seller: https://backpack.tf/profiles/76561198042454171#!/compare/1590796800/1590883200

Buyer: https://backpack.tf/profiles/76561198151080575#!/compare/1590796800/1590883200

https://backpack.tf/item/7957317811

9 keys

Sale 6:

Sold for 9 keys

Seller: https://backpack.tf/profiles/76561198054021703#!/compare/1589414400/1591228800

Buyer: https://backpack.tf/profiles/76561198337734785#!/compare/1591142400/1591228800

https://backpack.tf/item/2455727383

21 are grouped together, but 12 came from a different buyer, just at around the same time. The last 9 keys are the ones that match.

9 keys

Marketplace Sales:

https://marketplace.tf/items/tf2/146;5;u57

$17, April 5th

$17.50, April 6th

$13.12, April 22nd

$30.70, May 7th

$22.95, June 2nd

No snapshots available.

https://backpack.tf/item/2463611209 - One of the April sales

Couldn’t find the other histories.

http://manic.tf/keyprice?at=2020-04-05&price=17 - $17 / $1.69 = 10.06 keys

http://manic.tf/keyprice?at=2020-04-06&price=17.5 - $17.5 / $1.69 = 10.36 keys

http://manic.tf/keyprice?at=2020-04-22&price=13.12 - $13.12 / $1.75 = 7.50 keys

http://manic.tf/keyprice?at=2020-05-07&price=30.7 - $30.7 / $1.88 = 16.33 keys

http://manic.tf/keyprice?at=2020-06-02&price=22.95 - $22.95 / $1.94 = 11.83 keys

After rounding, we have:

10 keys (2x)

Other Sales:

https://backpack.tf/item/2463611209 (#1)

https://backpack.tf/item/2236844643 (#2)

#1

Untraceable

https://backpack.tf/profiles/76561198416760083#!/compare/1585785600/1585958400

https://backpack.tf/profiles/76561198363395191#!/compare/1585699200/1585785600

#2

Untraceable

https://backpack.tf/profiles/76561198342161127#!/compare/1588896000/1588982400

https://backpack.tf/profiles/76561198115381172#!/compare/1588809600/1588982400

#3

Bulk

https://backpack.tf/profiles/76561198115381172#!/compare/1590710400/1590796800

https://backpack.tf/profiles/76561198097499917#!/compare/1590710400/1590796800

Sellers:

https://i.imgur.com/8mOquk6.png

https://backpack.tf/item/2455727383 - ~10.6 keys

Sales at:

7.5

9 (2x)

10 (3x)

11 (2x)

12 (2x)

16

Buyers higher than 9 keys. Not enough sales at 9 to call it a common selling point Excluding 9 and below.

16 is an outlier, excluding 16.

Seller at ~10.5 keys is pretty young, and most of the sales higher than it are pure sales, so it should be fine to keep the higher values in.

Taking 10-12.