Empire Market is fine and most popular Deep Net Marketplace right now. Being this famous it faces the problem of regular Ddos attack witch leads prime Empire Market link to be down, and alternative URLs as well. That means that empire marketplace need to design a lot of URLs and tor mirror and links. And the thing is that there is not much ways costumers can get a legit Empire Market links.
So that's why Empire Marketplace decided to create an official site where their users can at any time discover working URLs and onion mirrors, for quick enter to Empire Market. Here it is http://empiremarket-link.com make sure you using it every time you need enter to darknet market empire market.