After hearing about Columbia Forest PureBond plywood here, I purchased a 10x box of both 5/32" Maple and 5/32" Walnut from Home Depot. The material isn’t as pretty as the GF Proofgrade stuff, but it’s 4x cheaper, so that is a pretty good alternative.
Here is how it arrives. Not the best packing job, but it was ok.
Here is the front(left) and back(right) of Maple.
Here is a side view of the Maple. Some pieces are a bit warped.
Walnut front(left) and back(right). I knew it would be one-sided.
And the side view of Walnut. Quite a bit more warped panels.
Overall, Im pretty happy with it. It’s not the prettiest, but it’s the same or cheaper than proofgrade draftboard, so I’ll use it for prototyping stuff, and for projects where the back side isn’t visible.