I quickly threw up a website through Netlify and added payment processing through PayPal.
My Goal: Find out if there is market demand. After reading "Start Small, Stay Small", I wanted to follow the suggested method of gauging interest. The recommended way is to put up a website that has a "Buy Now" button. Since PayPal was an easy setup and the product was already built, users could already purchase the app. So I listed it for $99.
After launching, I placed the link to the website on blogs, forums, comment sections of various articles and websites that discussed mock Salesforce data, and that was it. Minimal marketing.