The opportunity to cash in on this adventure is still valid but only if you play smart. Buying and selling domain names is a great side business idea for entrepreneurs with strong research skills. Understanding the audience you want to sell to and being able to recognise valuable domain names are the key drivers behind the success of this business and the knowledge comes only with careful research and testing. Check out Sedo, one of the most popular domain marketplaces, to get a better insight into pricing and trends.
I created an “Every Day I’m Hustling” shirt and sold enough for the campaign to ship, but didn’t earn much on the experiment because of some not-very-effective Facebook advertising. Still, some opportunity here and a friend of mine is doing REALLY well with this. If you can create awesome designs and reach the right people with good Facebook targeting, Teespring can be very profitable.