how can i test if a product will make money? | warrior ... - how can i make my own facial mask

Hey man!
I was just wondering if you could give me some advice on how to test the feasibility of the information product in the market?
I 've secured a domain and want to create a sales page for it (before actually building the product) to see if people actually click the Buy Now button.
Is there any suggestion to do so?
Should I just build the sales page and then send traffic to it via facebook and google?