I don't know as there would be any way to put an "average" value on something like that. I don't think there's a real developed wholesale market for it. If you have a sufficient quantity of wood that is in good condition, and has "character", someone may want it for the purposes you mention, but it's all about finding the right buyer who would want it. You might want to try talking to some high-end builders or remodelers and see if they're interested.

no market value here its the you tear it down you can have it system

I know some people buy wood barn siding for making furniture or flooring. What is an approximate value?

For example, If I have a barn that I need to sue for livestock so it needs new siding, I might as well sell the wood siding to someone who would use it.