I took a chance, ordering something from a member who'd listed 10 items four months before but had zero sales, and didn't respond to a measurement question. She never responded to Mercari, either, so I got my money back when I cancelled after 3 days, but what a waste! If some people list on impulse but neglect or are so indifferent to tending their listings, Mercari should (but evidently doesn't) have a means to get rid of them.