I use the german craigslist, eBay Kleinanzeigen, since ~2014 to buy and sell used stuff. Last 1-2 years it feels like scammers have gone exponential, people that I sold to claiming they haven't got their parcel, people selling stuff to me and not shipping it, etc... Didn't have as much problems in the last years together than this year. I guess some see this as attractive "side hustle", feels like people were a bit more honest pre 2020.