Selling a patent outright obviously is a desired outcome, particularly if it can be sold several times over in designated areas of the world. Extracting profits from your invention removes the uncertainties of operations under licensing agreements. The inventor in this case would assign all rights and interests in their patent. One must realise that a patent generally has a limited life. It is only good until there are enhancements to technology or a better solution or concept is found. And that is yet another reason not to procrastinate. Get moving with your patent. Step carefully.