Depends upon who will take it and what the local rates are.

Phone around.

Yep, soil is expensive to get rid of, and CL usually has lots of offers for free soil that go unanswered.

Are there any low spots in your yard that need to be evened out? Can you build some raised planting beds or berms somewhere in your garden and use the soil there? Are you thinking of building a waterfall for your pond, that could make use of the soil? The cheapest solution is to find a way to keep the soil on site.

Bermuda grass roots can go down 3-5', and new growth can sprout from those deep roots. That is why it is so difficult to eradicate.

I've been researching about cob and looks like it's a good idea to use my clay for that purpose and make boulders, benches and other things out of them for my planned Japanese garden. I used a hammer this morning to crush the globs into powder, time consuming but at least I won't have to pay to get rid of it.