Past 3 months:

Sale 1

Sep 27th 2025: sold for 14.99$ on mp.tf

Key price at the time: 1.89$

-> 14.99$ / 1.89$ = 7.93 keys

Sale 2

Oct 10th 2025: sold for 14.99$ on mp.tf

Key price at the time: 1.90$

-> 14.99$ / 1.90$ = 7.89 keys

Sale 3

Nov 27th 2025: sold for 15$ on mp.tf

Key price at the time: 1.80$

-> 15$ / 1.80$ = 8.33 keys

Taking 8 keys flat

Sources

Key prices

Boundless Blizzard Pool Party mp.tf sales

Gladiator.tf doesn't have recent sales, but the most recent one (Jan 2024) was also 8 keys

Don't know if it matters but I do own one