You need to find a particular product or niche to really make this work. Otherwise, you’re met with different shipping costs, always trying to figure out new margins, etc. Don’t try to be everything to everybody. Try to be good in one particular. Maybe it’s a product you’re passionate about such as selling trucker hats. 🙂 Click here for more on this idea.
Do you have a ton of followers on your personal Instagram, Twitter, or any other social media? You can leverage those followers into cash dollars. “Influencer Marketing” is becoming really popular these days as brands are looking for more authentic ways to connect with their target audience. Check out this (free) Step-By-Step Guide To Becoming An Influencer In Your Industry.
You could try advertising more, for example, by putting up signs around the neighborhood, posting about it on social media, or having people you know spread the word. You could also try doing it in a different neighborhood that might have friendlier people, or do it in a time and place where there's likely to be a lot of people walking around the area (e.g., near a church before the end of a mass).