Marketplace Sales:

https://marketplace.tf/items/tf2/633;5;u57

$19.95, March 5th

$20.10, April 4th

$19.44, April 12th

$19.99, April 18th

$12, April 18th

$19.10, April 21st

$19.39, April 25th (2x)

$29.80, May 14th

No snapshots during any of the sales. There are a couple after the March marketplace sale, then a gap between September and then.

http://manic.tf/keyprice?at=2020-03-05&price=19.95 - $19.95 / $1.69 = 11.80 keys

https://backpack.tf/item/6132430030 - March 5th

http://manic.tf/keyprice?at=2020-05-14&price=29.8 - $29.8 / $1.90 = 15.68 keys

https://backpack.tf/item/7955926479 - May 14th, maybe one of the late April sales too

Couldn’t find any other history.

http://manic.tf/keyprice?at=2020-04-04&price=20.1 -$20.1 / $1.72 = 11.69 keys

http://manic.tf/keyprice?at=2020-04-12&price=19.44 - $19.44 / $1.71 = 11.37 keys

http://manic.tf/keyprice?at=2020-04-18&price=19.99 - $19.99 / $1.79 = 11.17 keys

http://manic.tf/keyprice?at=2020-04-18&price=12 - $12 / $1.79 = 6.70 keys

http://manic.tf/keyprice?at=2020-04-21&price=19.19 - $19.19 / $1.79 = 10.72 keys

http://manic.tf/keyprice?at=2020-04-25&price=19.39 - $19.39 / $1.79 = 10.83 keys (2x)

After rounding, we have:

11 keys (5x)

12 keys (2x)

16 keys

Other Sales:

https://backpack.tf/item/7955926479 (#1)

https://backpack.tf/item/2606056522 - gambled

https://backpack.tf/item/2186697429 - tradeback or alt/friend transfer

#1

Bulk for Snowblinded Citizen Cane

https://backpack.tf/profiles/76561198412372767#!/compare/1585872000/1586390400

https://backpack.tf/profiles/76561198286543973#!/compare/1585785600/1585872000

Sellers:

https://marketplace.tf/items/tf2/633;5;u57

https://backpack.tf/item/2204165680 - $24.99, ~13 keys

https://backpack.tf/item/2606056522 - $29.99, ~16 keys

Sales at:

6.5

11 (5x)

12 (2x)

16

6.5 is an outlier, excluding 6.5

16 is an outlier, excluding 16.

Taking 11-12.