The value of it's gone up about twenty times since I bought it, back in the eighties.
That's quite a return. I live in urban area, and I don't have lot of storage space or any knowledge about wood really, so I guess it's not for me, but kudos on your investment decisions so far (both wood and btc

)
EDIT: just out of interest: is it hard to find a buyer/seller at a good price? What is the typical "spread"/cost of transaction so to speak?
I wouldn't have much trouble finding an end-user (i.e., craftsman/woodworker) buyer, but I spent a few years working wood myself, and I have contacts. Other than that I couldn't say. I know there are a few bourses for wood here and there, if you want a middleman.