Resuggesting, thank you Strange and Blaze..

Sales

Sale 1: Untrace

https://backpack.tf/profiles/76561198354555483#!/compare/1592438400/1592784000

https://backpack.tf/profiles/76561198224899376#!/compare/1592352000/1592438400

Sale 2: Untrace

https://backpack.tf/profiles/76561198284111912#!/compare/1592265600/1592611200

https://backpack.tf/profiles/76561198354555483#!/compare/1592179200/1592265600

Sale 3: Sold for 8 keys + 15 ref

https://backpack.tf/profiles/76561198124208012#!/compare/1597968000/1598054400

https://backpack.tf/profiles/76561198398555135#!/compare/1597968000/1598054400

8.32~.

Sale 4: Sold for 8 keys + 4 ref

https://backpack.tf/profiles/76561199077312337#!/compare/1597968000/1598054400

https://backpack.tf/profiles/76561198124208012#!/compare/1597968000/1598054400

8~

Exchanges with scammers and scrap.

https://backpack.tf/item/2322059178

https://backpack.tf/item/8860302609

Marketplace

https://marketplace.tf/items/tf2/30182;5;u35

24.99 on June 17 (24.99/1.98 = 13~)

https://manic.tf/keyprice/?at=2020-06-17

B/b/o was 12

https://bot.tf/stats/listings/MXXW6D38

Classifieds

https://gyazo.com/baf7896bfb9d76115d9cd9f33c020d34

Summary

Sales at 8, 8.5 and 12.

Conclusion

8.5 sold in a day, I was going to exclude 8, but 8.32-12 has a median above 10, which means 8.32 rounds to the nearest whole number of 8, rather than to 8.5.

Going with 8-12 here.