Do you have a great product? Well Shopify.com is asking you to prove it. Shopify is holding its 3rdBuild-A-Business competition with the grand prize being $50,000 and mentoring from some of the best: Daymond John (FUBU), Tim Ferris, Tina Roth Eisenberg, and Eric Ries. All you need to enter is a product sold in an online store and to chose your preferred mentor. The best part is you’ll get mentoring the whole way! At the end of the competition, the top four highest revenue stores will each win a $50,000 investment from their mentor. It sounds like a win-win to me!