updated link for any of Darknet markets
You are allowed to log into distinctive Deep Web marketplaces with the only help of URL, which determines the following : prospective clients and dealers don’t have a possibility join the market before they will acquire an urls from an already enlisted vendor or buyer.
Look at http://deeponionmarkets.com/, it posts new links to described Dark Web markets. You shall go to these URLs in order to get access to the sites.
Wherever there are some troubles with an access (links don't work), you should hang around and check for Deep Web markets URL. Keep trying, because few marketplaces close and let registrations regularly, depending on server load.