Selling an Idea to a company?

Hi i need some assistance with something. I have an idea for a basketball rim and I am looking to sell the idea to any reputable company who would buy it from me. The thing is the idea is not patented so basically I would only be selling the idea and not the patent itself. I need to know if there is any reputable and honest company who can negotiate with me without trying to rip me off. If you can assist please email dahbosss@gmail.com