eBay used to be so good, and you can still find cool stuff there, but it's mostly flooded with Chinese junk that people are, "drop shipping," from aliexpress or alibaba. eBay is also well known for it's terrible management.

These days, I think people categorize eBay as more similar to a site like Craigslist than a site like Amazon. I know I do, although that definitely doesn't stop me from using it.