Sounds like depression..

Sales

Sale 1: Sold for 40 keys

https://backpack.tf/profiles/76561198192602363#!/compare/1599350400/1599523200

https://backpack.tf/profiles/76561198271382917#!/compare/1599350400/1599523200

Sale 2: Untrace, looks like scm at a lower price..

https://backpack.tf/profiles/76561198079530721#!/compare/1592784000/1593907200

https://backpack.tf/profiles/76561198192602363#!/compare/1593734400/1593820800

https://steamcommunity.com/market/listings/440/Unusual%20Coupe%20D%27isaster

Two duped sales below.

Sale 3: Bulk

https://backpack.tf/profiles/76561198234581744#!/compare/1598486400/1598745600

https://backpack.tf/profiles/76561198083134207#!/compare/1598486400/1598745600

Sale 4: Sold for 36 keys

https://backpack.tf/profiles/76561198140565712#!/compare/1596585600/1596758400

https://backpack.tf/profiles/76561198234581744#!/compare/1596412800/1596585600

Marketplace

https://marketplace.tf/items/tf2/330;5;u13

July

$76.87 on July 6 (76.87/1.99 = 39~)

https://manic.tf/keyprice/?at=2020-07-06

Listings during the time: https://bot.tf/stats/listings/MVQ57V63

Classifieds

https://gyazo.com/58262b18686448accd0a6b5130e5dc4e

Summary

Sales at 36 and 40.

Marketplace sales at 39.

Conclusion

36 is under buyers, going to exclude it.

Going with 39-40 here.