I'm in the middle of building a useful (as I think) SaaS for small e-commerce stores. Before I got too deep into that, I'd like to find out if they are really interested. In other words, I want to try to sell the product before I finish that.
How do I approach my potential? Should I write tons of (e)mails? I wanted to find about 100 customers in the area where I live (Boston, MA). It will be easier for me to go and sell my product directly to them, not over the phone. I tried to find e-shops using Google Maps, but I found only 20 of them in Boston my area. Yellow pages did not help at all.
Does it mean that the market is just too small or am I doing something wrong?