I'll never understand..

Sales

Sale 1: Sold for 18 keys

https://backpack.tf/profiles/76561198061489334#!/compare/1598659200/1598745600

https://backpack.tf/profiles/76561198056176130#!/compare/1598313600/1598745600

Sale 2: Untrace

https://backpack.tf/profiles/76561198084635414#!/compare/1592956800/1593993600

https://backpack.tf/profiles/76561198080890931#!/compare/1592524800/1593648000

Sale 3: Traced 11 refined?

https://backpack.tf/profiles/76561198002757046#!/compare/1592611200/1592697600

https://backpack.tf/profiles/76561198084635414#!/compare/1592611200/1592697600

There were 17 keys from the buyers comparison, but not all of which were matching, I assume the sale was 17 keys + 11 refined, but unconfirmed.

Marketplace

https://marketplace.tf/items/tf2/101;5;u7

July

$22.22 on July 1 (22.22/2.02 = 11~)

https://manic.tf/keyprice/?at=2020-07-01

Classifieds

https://gyazo.com/a1e1b51c701d4b79631a2530b1569aa3

Summary

Sales at 18.

Marketplace sales at 11.

Conclusion

Sale 3 was probably 17~ so that makes 2 pure sales around that value. Excluding 11 as it's lower than the other two sales.

Going with 18 as 17 is unconfirmed.