Resuggesting.

Random Fact #15: The Internet is the fastest-growing communications tool ever. It took radio broadcasters 38 years to reach an audience of 50 million, television 13 years, and the Internet just 4 years.

Sale 1:

https://marketplace.tf/items/tf2/30420;5;u62

https://marketplace.tf/items/tf2/5021;6

Sold for 75 USD on 5th May, 1 key is at 1.93 USD.

75/1.88= 39.8, rounding to 40 keys

Sale 2:

https://marketplace.tf/items/tf2/30420;5;u62

Another sold for 90 USD on 11th Apr.

90/1.7= 46.6, rounding to 53 keys.

Trade 1:

https://backpack.tf/profiles/76561198039533394#!/compare/1590278400/1590364800

https://backpack.tf/profiles/76561198396499936#!/compare/1590192000/1590278400

Circling Heart El Jefe (2 yr-old price, mini below) for DBD Danger +9 keys

Circling Heart El Jefe mini:

https://backpack.tf/profiles/76561198086346739#!/compare/1589760000/1589846400

https://backpack.tf/profiles/76561198396499936#!/compare/1589760000/1589846400

Sold for 39 keys pure.

39= x+9

x=30 keys

Trade 2:

https://backpack.tf/profiles/76561198146046621#!/compare/1590019200/1590105600

https://backpack.tf/profiles/76561198039533394#!/compare/1589587200/1590105600

DBD Danger + 11 keys for Burning Flames Noble Amassment of Hats (outdated price, mini below)

BF NAH mini:

https://marketplace.tf/items/tf2/137;5;u13

Sold for 105 USD, 105/1.93= 54.4, rounding to 54.

x+11=54

x=33 keys

Classifieds:

https://imgur.com/a/NwjETEI

Prices at 40, 53, 30, and 33. Buyers at 36+, exclude 30 and 33 from final price range

Setting range from 40-53.