I chose this app to sell on over vinted or poshmark bc they dont take out a portion of the money you make. So far ive sold 10 items (1 pair of shoes, the rest clothing) for anywhere from $3 to $15. i tend to put my prices down pretty low. i didnt think id make any money as this app isnt as popular as poshmark or vinted but some of my items have been sold within a minute of putting it up, literally. i have never had an item removed but to avoid having that happen to you, read the faq to know the dos and donts of mercari. i also have never had any issues with customer service like others reviewers have. it is an automated message but a representative emails you back following the automated message (can sometimes take up to 24 hours tho)
some things i would change:
-be allowed to add more than 4 photos
-for pants sizes, have them as a size 0, 2, etc instead of waist sizes (24 in, 25 in, etc)
-allow vacation mode for sellers going on vacation (you can deactivate the listings while youre gone and then reactivate them later but that can take a while if you have a lot of listings).