Hi Hank,

I think the hardest part of selling a product is advertising it, getting people to know your product. There are many well known companies that sell products designed by somebody else. For instance, Sparkfun.com is always adding new products to their webpage. You can send them a prototype and maybe they like your idea, just a thought . On the downside, I personally would be worry of somebody else stealing my ideas . Patenting a design costs a lot of money and many times it is not worth it.

Robert