Gladiator.tf stats link: https://gladiator.tf/sales?item=The%20Big%20Kill

Screenshot: https://i.imgur.com/94vzWR0.png

Bonus sale, bought one for 10 keys 9 ref: https://i.imgur.com/m25J9ho.png

Classifieds screenshot: https://i.imgur.com/hbZb45c.png

Taking keys at ~56 ref since that's where they've been for nearly a week.

In the past 30 days, sales or buys at:

8 keys 44.88 ref (8.80)

9 keys 33.22 ref (9.59)

9 keys 36.77 ref (9.66) x3

9 keys 42 ref (9.75)

9 keys 44 ref (9.79)

-----buyer level 9 keys 49.33 ref (9.88)-----

10 keys 7 ref (10.13)

10 keys 7.11 ref (10.13) x2

10 keys 9 ref (10.16)

10 keys 20.44 ref (10.37)

-----seller level 10 keys 20.55 ref (10.37)-----

11 keys

Ignoring all buys below current buyer level as "pre price shift". Rounding to nearest 0.1 since price is over 10 keys, and going with 10.1-10.4.