What's it worth???
If I'm selling it, a million bucks or as close to that as I can get for it.
If I'm buying it, as close to a buck as I can get it for.
Depends on which side of the fence you are on I guess.
Seriously though, to some it isn't worth the time and effort to dry, joint, plane and work with.
Others see beauty in it like you and those are the ones you bid against.
If it is to be marked and put away, the cheapest you can bargain for, if you have a select project in mind that this will help it be the greatest creation that has formed in your mind for a particular person, it is priceless.
This answer is a little sarcasm, but also a little like Toni's answer to the Michigan slab, they are unique pieces for unique projects to enhance their looks. Takes unique craftsman to enhance it. So to be honest, I look at this type of wood as an investment, I have a little stashed away and quite honestly, some of that stash will probably outlive me, I hope someone else finds it as a diamond in the rough and treats it as so. So, if a project dictates this, buck fifty seems quite reasonable. It cared for properly will probably even resell years to come with a better return than a savings account now does.
God and family, the rest is icing on the cake.
I'm so far behind, I think I'm in first place.
Premier Bovine Scatologist
Host of the 2015 FAMILY WOODWORKING GATHERING