In my opinion, if as another comment hinted there is a real need then either: a) you are unable to reach your target user or buyer b) you are unable to close a sale c) you onboarding experience or UX needs work (the little things needed to manage this solution day-to-day.

As the other commenter suggested, I would recommend finding buyers on Twitter and seek feedback before selling. It's easy to lie to yourself in customer interview so suggest reading The Mom Test to understand how to get meaningful feedback that is unbiased from your potential audience. You should also Tweet on your subject with a focus on the problem you are solving and why it is a problem, rather than your solution.