When someone favourites one of my items on Vinted, I always have a quick look at their profile and reviews. Most people are fine, but there's been a few people I've blocked if they have whole strings of bad reviews (one or two is usually fine).
My question is, if someone has several bad reviews from selling, sale not completed etc, especially if they haven't replied to say "this review is unfair because..." would you still block them from buying from you? If they've got bad reviews for selling, are they likely to also be a problem buyer?