There is a good market for DP breeds if you sell them right. They are hands down amazing fried. I prefer them over the CX because the meat cooks all the way through evenly. Because of the larger breast in the CX I always seem to keep the middle pink.
You can throw them on the grill too, as long as they aren't too old. It's definitely a niche market but there are people out there willing to buy them. Go with a heritage breed... they seem to sell better. Even though they don't taste any different in my opinion than any other DP breed.