Whit,
Yes, there is a pretty
steady market to black cohosh. The price per pound isn't quite as high as goldenseal, but the yield is higher per plant. currently it's selling for about $3.50/lb. A year ago it was over $5. Its nothing your going to get rich from, but in my opinion its a much better plant for providing shade for ginseng. Around my parts a lot of folks know it as \"pointer\" because it is a pretty good companion plant of wild ginseng, and points you to it...
Its pretty common to find older black cohosh plants standing 2-3 feet tall, not including the flower spike that comes straight out the top and is often by itself taller than the rest of the plant