So I am gonna super generalize this. If I am leaving anything out let me know. 1. Use a service like TOR or Tails and a VPN. 2. Buy bit coins place into wallet not associated with illegal activities 3. Tumble bitcoins place into wallet of whatever market place you plan on using 4. Buy product send relavent information to vendor with PGP 5. Wait for said product to arrive?!?!?!
Download tor browser bundle
Download PGP
Go on market, find listing you want, see how much it is
Buy enough bitcoin to cover the purchase
Send bitcoin to an address you own, then send it from there to your market address
Go to item you wanted, click buy
use PGP to encrypt your address to the vendor's PGP key
Press confirm order
Wait a few days
Enjoy