Vinted seems popular amongst people who never used eBay for buying and selling commodities like clothes. Is it any good for selling higher value specialist stuff like electronics, musical instruments etc?
For higher value goods people usually prefer others, I think Backmarket.com is one of the main ones (it's definitely the main option for electronics in France) but there's also Refurbed (know it from Belgium but I think it's German) or Rebuy (know it from the Netherlands but it's German as well) for example.
Each of those three claims to be the largest one in some metric.