I've got an big old Burl I'd like to move on to a woodworker who could do something with it. But I have no idea what value it has and what would be reasonable to expect/ask for, if anything. Any advice would be greatly appreciated.
That's a sweet-looking burl, Steve. If you weren't clear on the other side of the continent, I'd be there helping you get some of that burl turned.
Sometimes eBay can give you a rough idea of a turning blank's worth, although I don't recall seeing anything this big listed there. I suspect if you cut it into the shippable blanks, you could find buyers on eBay or other online venues. On the other hand, I suspect there are turners who'd jump at the chance to have that thing in its whole form. I just don't know what they'd be willing to pay. (But it's definitely worth paying for, in my opinion.)