Empire Market is current, original and expanding for the ceiling of dark web market on the onion.
It takes almoust all of it's fundamental features from now Alphabay. And calls itself a beneficiary of it.
The validity of It's onion URL can be verifiable by using the deep web marketplace's own link-verifier website http://empiremarket-url.com/.
If onion mirrors links are not working, here is the links where you can find fresh darknet marketplace mirrors http://empiremarket-url.com/