I put up a test landing page for a SAAS product/service that I think has potential. My goal is to test the market to see if there is enough interest to justify building out the product/service.
The page currently consists of a detailed description of the service, and an email signup to "Join our Private Beta".
I don't state what the monthly price point will ultimately be, however I do state that "by taking part in the private beta, you will have the opportunity to lock in a discounted rated for life" — Essentially implying that this will in fact be a paid (not free) service.
I've had a modest number of signups so far... So this gives me some validation of the product/service being offered.
My question is: Should I also validate the price point before building it out?
Is there a good rule of thumb for testing/validating a market prior to building a SAAS product/service?