Old logs too dry for milling?

I moved into a new house and inherited some logs with the property. I believe these are ash. There are a few shorter logs and another standing dead in the yard.

I’ve considered hiring a mobile sawmill team to process these to use for woodworking. They are all pretty heavy and I can only roll them around with a pry bar. I’m wondering if the cracks indicate they’re too dried out (and cracked through) to justify the cost. The logs pictured are about 2’ diameter.