You'll need to meet the following requirements, $1500 in sales, 30 Transactions Vending for 6 weeks. Once you reach all of the requirements you'll then need to contact marketplace support, you'll also gain access to the Vendor Roundtable which is a board on the forum where vendors can interact. Here's where you request for your forum account to be upgraded to vendor status. http://silkroad5v7dywlc.onion/index.php?topic=15381.0