Re-suggestion from old one. Thanks Xergoyf for the update!

Item: https://backpack.tf/item/3460049830

Sale #1

https://backpack.tf/profiles/76561198279670065#!/compare/1602460800/1602633600

Sale for 39 Keys.

Sale #2

https://backpack.tf/profiles/76561198974703657#!/compare/1603152000/1603238400

Can trace 38 Keys 19.22 ref, rounding to 38 Keys.

Sale #3

https://backpack.tf/profiles/76561198140584551#!/compare/1603670400/1603756800

Bulk sale

Disco Beat Down Slo-Poke (active suggestion at 33 Keys) + Death at Dusk Tartan Spartan(39.5 current suggestion) for Stormy Storm Killer Exclusive (85 Keys) [can use there for KE]

Sale #4

https://backpack.tf/profiles/76561198056571743#!/compare/1604102400/1604188800

https://backpack.tf/profiles/76561198057696126#!/compare/1604016000/1604102400

Strange Killstreak Tiger Buffed Loose Cannon (Well-Worn) (1 Key recent sale) + 40 Keys pure = 41 Keys

Item: https://backpack.tf/item/3268921719

Sale #5

https://backpack.tf/profiles/76561198109881598#!/compare/1601337600/1602028800

https://backpack.tf/profiles/76561198168863803#!/compare/1601251200/1601337600

Bulk

Sale #6

https://backpack.tf/profiles/76561198256998558#!/compare/1604016000/1604102400

https://backpack.tf/profiles/76561198109881598#!/compare/1602460800/1604102400

It only traces 35 Keys here

Sold for 39 keys, confirmed with the buyer

https://ibb.co/zFnBk97

No sales from marketplace

Please note: Sale #5 and #6 are duped. Also sale #6 was sold for more than a clean one on Sale #2

Summary

Sales at

38 Keys

39 Keys

39 Keys

41 Keys

Conclusion

I'd suggest a price range from 38-41(avg. 39.5 Keys) here. Seems like there's no change in price.