Resuggesting, thank you Xergoyf.

Sales

Sale 1: Sold for 24 keys

https://backpack.tf/profiles/76561198074924284#!/compare/1597449600/1597536000

https://backpack.tf/profiles/76561198350322059#!/compare/1597363200/1597449600

https://bot.tf/stats/listings/MVQGWK8W

but this has been listed since 2019 actually..

https://bot.tf/stats/listings/4J3E0LPY

https://bot.tf/stats/listings/Y3D9RZQ4

https://bot.tf/stats/listings/Y9QQQN70

https://bot.tf/stats/listings/M0OV555X

https://bot.tf/stats/listings/MVQGWK8W

Sale 2: Sold for 16 keys + 20 ref

https://backpack.tf/profiles/76561198038142758#!/compare/1593043200/1593129600

https://backpack.tf/profiles/76561197961484646#!/compare/1587600000/1593043200

16~ confirmed by buyer. (thank you icekwibby)

https://gyazo.com/fb3c8d32ab92367836d50f6902ca1c40

Sale 3: Untrace

https://backpack.tf/profiles/76561198305494036#!/compare/1592179200/1592265600

https://backpack.tf/profiles/76561198038142758#!/compare/1592179200/1592265600

Sale 4: Sold with about 3.75~ keys of sweets for vivid translator (19 keys)

https://backpack.tf/profiles/76561198053809624#!/compare/1592611200/1593043200

https://backpack.tf/profiles/76561198236030772#!/compare/1592524800/1592611200

19 - 3.75 = 15~

Translator: https://backpack.tf/suggestion/5f4b3deaa84359543579b56f

Sale 5: Sold for s.ks aussie grenade launcher (16~)

https://backpack.tf/profiles/76561198850178158#!/compare/1592524800/1592611200

https://backpack.tf/profiles/76561198053809624#!/compare/1592006400/1592611200

16 keys~

https://bot.tf/stats/listings/M0OEWKDV

https://bot.tf/stats/listings/MNR9W115 - normal

The GL had sellers at 16 at the time of the sale, so that sale should be 16. I show the non-ks's snapshot as well because normal ks doesn't usually add value to aussies, and it strengthens the 1 seller at 16 for the ks.

Marketplace

https://marketplace.tf/items/tf2/480;5;u19

Nothing recent.

Classifieds

https://gyazo.com/58a31d4f49ef59bc8207d0eb5b6bff7c

Summary

Sales at 15, 16, 16, and 24.

Conclusion

24 was pure, but it seems high considering the other sales, and considering it was listed at 24 since 2019.

going with 15-16 here.