I sometimes use AliExpress for DIY electronics like microcontrollers and other components. An Esp32 usually costs around 8-12 euros in Europe. On AliExpress I buy them for 3 (plus shipping). Its worth it if you are buying more than just a few. Shipping is usually slow but if its not urgent its cheap and so far of good/ decent quality.
I did also buy a small industrial camera on there which did not work. I contacted the seller and after some troubleshooting they agreed to ship a new camera to me (still waiting on that one) but in principle I am satisfied with the service for the price I payed.