Lowes has Bulls Eye 2 Interior or Exterior Multi-Purpose Water-Based Wall and Ceiling Primer in the larger sizes on clearance. They are not orderable online unless you use lowesforpros.com, so like other Lowes clearance items consider this a B&M deal. Lots of availability at multiple zip codes I tested.
The 2 gallon buckets are as low as $5 in some areas, but I saw widely ranging prices with multiple zip codes between $5-18. YMMV on actual price
Link (for reference only): https://www.lowes.com/pd/Zinsser-...z/50276497
Check local stock: https://brickseek.com/lowes-inven...u=50276497
The 5 gallon buckets are $50 (36% off).
Link (for reference only): https://www.lowes.com/pd/Zinsser-...z/50276499
Check local stock: https://brickseek.com/lowes-inven...u=50276499