Mercari is a classified ads app and website that users can come and sell or buy their used stuff locally. Mercari is popular to use in Canada as well as in USA. So if you havent tried this site out yet, then you should. This Tips for Mercari selling app is unofficial but it provides you tips how to use Mercari correctly so you know what you are doing and how to navigate around the app. Also, you will find tips on buying and selling on Mercari as it can be unsafe sometimes, so better be cautious of things.