My dad took some walnut and sycamore logs to a sawmill in the OKC area and had them turned into lumber. My brother's father in law (a cabinetmaker by trade) knew the mill, but I don't recall what they paid (plus, that was nearly 20 years ago). The finished product was rough-cut lumber, but hopefully you're not expecting finished lumber from a sawmill. My dad made a few things from it, but most of it sat stacked away in my garage, then got moved to his shop. My brother's FIL ended up buying it at the estate sale after my mom passed last year.
When the tornado went within a mile of my house and broke a huge red oak up near the road, I had my brother's FIL take a look at it. He said it would make some decent lumber, but probably wouldn't be worth the cost of having it milled--but red oak is common as weeds around here.
A few years ago, one of my dad's hay customers had his portable sawmill stored in his hay barn when it burned down, so my dad traded him some hay for the burned up sawmill. It was another of those "more projects than time" deals, so my dad's plan to restore it never came to fruition. When he passed, the guy who traded it to him offered to sell it for my mom. It was in seriously rough shape (it had warped from the heat of the fire, the the little Briggs gas engine that ran it was slag, and all of the wiring was burned away), so we expected to get scrap value for it, but those things are (or were, in '22) in high demand. He put it on FB Marketplace, and some dude paid $2,500 for it.
I don't know what the market is like, but if you can get $2.5K for a burned out hulk, I'm guessing it wouldn't be hard to get your money back out of one if you choose to go that route.