No, not every good in the world is priced in US dollars and presented as a random number that changes every day

pretty much every good is sold on ebay

I never buy anything in dollars on eBay. Sterling, sometimes, but it’s euros 99% of the time.

Prices on eBay actually look like something a human would choose. On AliExpress on the other hand the prices are all over the place, with really odd numbers of cents, which I assume comes from automatic conversion from whatever currency they initially priced it in (not necessarily dollars at that point).

Not everything sold on ebay is priced in dollars either.

that was my point