This is a story about how an entrepreneur can build an internet business on the side. The business Sean Percival launched wasn’t meant to be the next Google. He was just trying to make some money and improve his business skills.

Sean built a site that sold customize European license plates, the kind of plates you might see on cars speeding on the Autobahn or cruising down the Champs-Elysées. As you’ll hear in this interview, he spent $12 to buy the domain, customeuropeanplates.com. Then he built the site using a free ecommerce platform. To fill and ship his orders, he partnered up with a company that was already in the business of selling license plates online. And he got customers by teaching himself search engine optimization and developing link partnerships with related sites.

He ended up selling the business — which was profitable — after Tweeting that he was thinking of selling it.

We talked in this interviewed about how he built the business, and how he built up the kind of social capital online that helped him sell his business for about $100,000 via a Tweet.

via The $12 Startup That Was Sold On Twitter For About $100,000 – with Sean Percival | Mixergy – Online Business Tips from Successful Entrepreneurs.