IOW, if you are a Steve Jobs, then people may be willing to put money into your ideas.

Otherwise, if you want to sell a idea/design/product that you dreamed up, here is what you can do. The option that will give you the best chance of success (as far as selling it) is to develop the idea into an on-going business before attempting to sell it. Not matter how great you think your idea is, the only thing that matters to a buyer (who is going to put money up front to buy it) is how much money you have already made from it. For example, say you have a nett profit before tax (and can prove so) of $200,000 in the previous 12 months. An interested party will value it at a multiplier of perhaps 2-5x annual profits. So you might might be able to negotiate anywhere from about $400,000 to $1M for it.

Another possibility (as I mentioned previously) is to develop a comprehensive business plan for your idea/product and try to sell it that way. You will still have to spend anywhere from 10-30 times (in terms of time/resources) of what you have put into design/development/prototyping phase. You can directly approach a potential buyer (extemely low probability of success) or seek venture capital to develop the business. Again, be prepared for many, many rejections. An associate who is in the venture capital industry said that only 1 in several hundred proposals ever gets funded.