I've put Volumes 1 & 2 of Creature Feature Quarterly for Old School Essentials on sale for just $1 each until May 1st.
Volume 1
https://drivethrurpg.com/product/307000/Creature-Feature-Quarterly-vol-1-OSE
Volume 2
https://drivethrurpg.com/product/307842/Creature-Feature-Quarterly-vol-2-OSE