Second sale seems to have sold for 10 Keys

https://backpack.tf/profiles/76561198153011059#!/compare/1780012800/1780272000

https://backpack.tf/profiles/76561199067395206#!/compare/1780185600/1780272000

Histories match with the 10 Key batch. IDs likely don't match due to it being a scrap.tf auction.

Sold for 12 Keys and some ref

https://backpack.tf/profiles/76561199067395206#!/compare/1780704000/1781222400

Was later dumped to qsstore, but qsstore seems to have been buying for 12 Keys as well, so this likely also went for 12 Keys:

https://next.backpack.tf/classifieds/snapshots/Green%20Confetti%20Partizan/6a2b29a616b4ef05fb036188

https://backpack.tf/profiles/76561198048311062#!/compare/1780790400/1781136000

I'm willing to say that current buyers are bots being finicky and not the best source of counter-proof currently, so 9-12 will be fine to take here.