I like shopping online and selling as well. I actually never bought anything from E-bay or Amazon but i use frequently aliexpress to buy some cool stuff like toys for my nephew or a small solar car i bought last year to do some experiments. The price was about 2 dollars. For some serious stuff like furniture or laptops, phones or anything that is more expensive or just bigger i use local sites from Serbia like kupujem prodajem, kupindo or i just browse for some ads.