Empire Market is hot, original and growing for the hights of dark web markets on the onion.
It has much all of it's fundamental features from now Alphabay. And calling itself a replacement of it.
The validity of It's onion mirrors can be confirmable by using the tor marketplace's own link-verifier page http://empiremarket-url.com/.
If mirror links out of work, here is the alternaive URL where you can find active darknet marketplace mirrors http://empiremarket-url.com/