If you don't want to run your company anymore, selling the company might be more trouble than it's worth. You won't get THAT much cash for it, and you might end up at a engineering job that doesn't suit you, with golden handcuffs so you don't leave. That's the risk. After you're done working at the acquiring company, you'll just be another engineer, with a nice extra line on your resume most engineers don't have.
On the other hand, at the acquiring company you could find a business cofounder and if you want to, start another company, with more cash in your pocket, and more credibility with investors. That's the upside! But you'll be assuming that you're going to have a better idea in the future than the one your currently have.
Anyway this is all hypothetical. If you want corp dev people to find you, you need visibility in the marketplace. That means SEO, blog articles, etc.