Empire Market is fine and most notorious Darknet Marketplace at the time. Being this great has it's consequences continuous Ddos attacks leading essential Empire Market URL to be down, and alternative URLs as well. That lead to empire marketplace need to make a lot of URLs and tor mirror and mirror. And the thing is that there is not to many ways users can get a right Empire Marketplace URl.
That's why Empire Marketplace decided to create an official page where their users can always discover legit URLs and onion mirrors, for instant enter to Empire Market. Here it is http://empiremarket-link.com make sure to use it every time you you have to login to darknet market empire market.