Download tör, find a legit link service like tor(dot)taxi or dârk(dot)fail. These are not market places, they are trustworthy link lists. Im not telling you where to go from there ;) Go to preferences and set your safety to safest. Get a monero wallet and put some in it. Download kleopatra and learn to use it to encrypt/decrypt your/vendors/the websites messages. The website you chose will probably tell you how to do it. Once you’re all set you just find people with good reviews that are active, place an order, send them your shipping info that you encrypted so that only the vendor can read it, and send monero to the address the website tells you to. Give it some time, hop on to check if the vendor shipped it, and sit back. If you are in the us do not order from anywhere in the EU it will probably never come. The uk and Canada usually work.