Marketplace Sales:

https://marketplace.tf/items/tf2/30311;5;u57

$35, Jan 31st

$44.99, Feb 7th

$35, April 3rd (2x)

$20.06, April 4th (2x)

$34.99, April 15th

$34.95, April 16th

https://backpack.tf/item/7957305419 - Most likely Jan 31st

http://manic.tf/keyprice?at=2020-01-31&price=35 - $35 / $1.76 = 19.89 keys

No Snapshot available during the time of this sale.

Couldn’t find any other histories.

https://manic.tf/keyprice/?at=2020-02-07&price=44.99 - $44.99 / $1.77 = 25.42 keys

https://bot.tf/stats/listings/Y8E2Z63W - No important B/O

https://manic.tf/keyprice/?at=2020-04-03&price=35 - $35 / $1.70 = 20.59 keys (2x)

https://bot.tf/stats/listings/4P0VPJLE - No important B/O

http://manic.tf/keyprice?at=2020-04-04&price=20.06 - $20.06 / $1.72 = 11.66 keys (2x)

Below buyers, no point checking snapshot.

http://manic.tf/keyprice?at=2020-04-15&price=34.99 - $34.99 / $1.77 = 19.77 keys

https://bot.tf/stats/listings/4ZPJ5N6Q - Probably the seller at 21. Couldn’t obtain the item history. Doesn’t cap here anyways.

https://marketplace.tf/items/tf2/5021;6 - $34.95 / $1.78 = 19.63 keys (price not available on the keyprice site yet)

https://bot.tf/stats/listings/MLVZ05L5 - Same story as the last

After rounding, we have:

12 keys (2x)

20 keys (3x)

21 keys (2x)

25 keys

Other Sales:

https://backpack.tf/item/7957305419 (#1 & #2)

https://backpack.tf/item/7956164803 (#3)

https://backpack.tf/item/7956145392 (#4 & #5)

#1

Sold with .5 keys in ref for Cloud 9 War Pig

https://backpack.tf/profiles/76561198311498888#!/compare/1579824000/1579996800

https://backpack.tf/profiles/76561198047852423#!/compare/1579737600/1579824000

Can probably be used on the War Pig if it isn’t too low there, which I doubt. Probably better to just exclude this sale entirely.

#2

Untraceable

https://backpack.tf/profiles/76561198047852423#!/compare/1580256000/1580342400

https://backpack.tf/profiles/76561198363395191#!/compare/1580256000/1580342400

I’m fairly certain the sale after this was marketplace.

#3

Bulk for Scorching Chill Chullo

https://backpack.tf/profiles/76561198158227857#!/compare/1578614400/1580428800

https://backpack.tf/profiles/76561198041822925#!/compare/1578960000/1580428800

Everything prior to this was gambling or otherwise unusable.

#4

Untraceable

https://backpack.tf/profiles/76561198178305653#!/compare/1585008000/1585094400

https://backpack.tf/profiles/76561198255850609#!/compare/1585008000/1585094400

#5

Untraceable

https://backpack.tf/profiles/76561198255850609#!/compare/1585267200/1585353600

https://backpack.tf/profiles/76561198123224716#!/compare/1585180800/1585267200

Sellers/Buyers:

https://i.imgur.com/Tgw5Xac.png

https://backpack.tf/item/7956145392 - 24 keys

https://backpack.tf/item/7956164803 - 24 keys

Buyers at high as ~16.5 keys

Sales at:

12 (2x)

20 (3x)

21 (2x)

25

12 is lower than buyers, and is already an outlier. Excluding 12.

25 is higher than sellers, and is already an outlier. Excluding 25.

Taking 20-21.