I imagine it's worth something, but probably not too much. When I needed a new crank, I found that by the time I purchased a used crank, had it checked out, and then reground, I could have a new forged stroker crank for only a few $$ more. Guess which way I went?!
But, if I had access at the time to a known good original crank for cheap, maybe I wouldn't have started my stroker build and I'd have more money in my pocket right now.