7 Profitable Ways to Make Money on Mercari as a Reseller.  Are you looking to dip your toes into the world of online resale and wondering where to start? Look no further than Mercari, the popular e-commerce platform that offers a wealth of opportunities for savvy entrepreneurs. With its user-friendly interface and diverse marketplace, Mercari provides ample avenues for making money as a reseller. Whether you're a seasoned pro or just getting started, here are seven lucrative ways to maximize your earnings on Mercari:.