Friends Dan Pinto and Dmitriy Rokhfeld go way back. The two met in middle school playing video games and eventually became co-founders of the company Machino.com—an online search engine where you can buy and sell used industrial equipment. They recognized a gap in the marketplace when Pinto was looking for a used printing press in 2012. He realized that there was no easy-to-use search engine that specialized in used equipment. There was kayak for hotels and indeed for jobs so he created Machinio for machinery.

This new search engine has revolutionized the way people buy and sell used machinery. It is the fastest growing global search engine in its category with 550,000 buyers from more than 190 countries. The service has opened new markets in all parts of the world that were previously unavailable. They have raised $4 million dollars from a number of investors and opened their second office in early 2017. Their solution saves users time by making it easy to buy and sell used equipment while putting all its users on an equal playing field. Their story showcases an important lesson. Learn to look for gaps in the marketplace that already come from good ideas.