You are allowed to enter at certain Deep Web markets with the only help of alternative link, it suggests a tricky situation : prospective clients and merchants lack the ability to enroll before they will obtain an link from an previously enrolled user.
Search for those at http://deeponionmarkets.com/, it stores updated alternative links to concerning Dark Web marketplaces. You shall follow these link in order to sign up at the sites.
Wherever there are some issues with an access (links don't work), you shall wait and check for Darknet marketplaces alternative URLs. Keep trying, because few marketplaces close and launch signing up frequently, based on server load.