https://backpack.tf/classifieds?item=Digit%20Divulger&quality=11&tradable=1&craftable=1&australium=-1&killstreak_tier=0

Buy orders start at 3.32, ~3.3 keys.

Sell orders start at 8.21, ~8.2 keys.

Bot.tf Sales:

https://ibb.co/fxgdFBW

https://ibb.co/jrj8BY1

1 Sold for 4.22, ~4.2 keys.

1 Sold for 3.88, ~3.9 keys.

Marketplace.tf Sale:

https://ibb.co/VLK0vtq

1 Sold for $14.90/ 1.87 = 7.96, ~7.95 keys.

SCM Sales:

https://ibb.co/wBrjWPh

1 Sold for $9.17/ 2.35 = 3.9 keys.

1 Sold for $7.68/ 2.24 = 3.42, ~3.4 keys.

1 Sold for $7.79/ 2.35 = 3.31, ~3.3 keys.

1 Sold for $7.98/ 2.27 = 3.51, ~3.5 keys.

1 Sold for $8.81/ 2.33 = 3.78, ~3.8 keys.

1 Sold for $9.17/ 2.37 = 3.86, ~3.85 keys.

Excluding all other sales due to them being either too low for current buy orders or too high for current sell orders. Going with 3.3 - 4.2 keys.