Which to use out of Rummij, eBay and Vinted?
The short answer: it depends.
See also speed comparison eBay vs Vinted vs Rummij
✓ Massive reach - it's the biggest marketplace in the world
✕ It's the most expensive; with fees over 10% for most sellers
✕ Dreadful user interface. It's the web equivalent of a rundown 2000s mall. Does that matter? Only when you're desperately trying to communicate with someone else, or it resets your search filters for the umpteenth time
✓ Amazing for second-hand clothing
✓ Zero seller fees
✓ Great user interface
✕ No trade accounts
✕ high buyers fees
✕ Takes a long time to list
✓ AI Quicklist makes listing phenomenally fast
✓ Zero seller fees and market leading buyer fees
✓ Good user interface
✓ Free shop front
✓ Automatic inclusion in Google Marketplace and SEO optimisation
✕ As a newcomer it has the smallest reach of the 3, with only UK sales