A vicinity oriented sales site

Sites for selling used stuff might be too global. If not other, scamming is increasing due to the anonymity.

Why not a site that is oriented around your neighbours? “is there anyone around here that has a used bike for toddlers?” “is there anyone in the block that has a used sewing machine?”

Now think about the attic and cellar. Stuff you don’t necessarily need to keep but don’t put in an ad due to the hassle. Just jot down what it is you’ve got with a picture and let the ad linger.