Marketplace Sales:

https://marketplace.tf/items/tf2/30547;5;u57

$13.08, March 17th

$24.95, April 22nd

$24.95, April 23rd

https://backpack.tf/item/7955903995 - one of the April sales

https://bot.tf/stats/listings/MNRZ0LPR - No important B/Os at the time of either April sales. Couldn’t find any other histories.

https://manic.tf/keyprice/?at=2020-03-17&price=13.08 - $13.08 / $1.69 = 7.74 keys

https://manic.tf/keyprice/?at=2020-04-22&price=24.95 - $24.95 / $1.75 = 14.26 keys

https://manic.tf/keyprice/?at=2020-04-23&price=24.95 - $24.95 / $1.77 = 14.10 keys

After rounding, we have:

14 keys (2x)

Other Sales:

https://backpack.tf/item/7957309467 (#1)

https://backpack.tf/item/7956670289 (#2)

https://backpack.tf/item/7955903995 (#3)

https://backpack.tf/item/7956005686 - scrap

#1

Untraceable

https://backpack.tf/profiles/76561198031660510#!/compare/1584144000/1584403200

https://backpack.tf/profiles/76561198454615761#!/compare/1584316800/1584403200

Not listed on bot.tf

#2

Untraceable

https://backpack.tf/profiles/76561197999507606#!/compare/1583193600/1585267200

https://backpack.tf/profiles/76561198834678807#!/compare/1585872000/1586217600

#3

Untraceable

https://backpack.tf/profiles/76561199038960749#!/compare/1587081600/1587254400

https://backpack.tf/profiles/76561198363395191#!/compare/1586995200/1587081600

Sellers:

https://i.imgur.com/tllnpR4.png

https://backpack.tf/item/7957309467 - 16 keys

https://backpack.tf/item/7956718760 - 19 keys

Sales at:

8

14 (2x)

8 is an outlier, excluding 8.

Taking 14 flat.