Stacker Market Pro Account members will receive preferred rates when onboarding existing metals via Asset Transfer Service or Bullion & Jewelry Swap, or redeeming your Stacker Market allocated ounces for physical metals.
To inquire for onboarding existing metals, kindly fill up the form at https://www.stackermarket.com/free-vaulting/
To inquire for redemption, kindly make a redemption request on the dashboard. You can refer to the following guides for reference:
How do I redeem gold?
https://help.stackermarket.com/en/articles/6099047-how-do-i-redeem-gold
How do I redeem silver?
https://help.stackermarket.com/en/articles/6098998-how-do-i-redeem-silver
Related articles:
What is Stacker Market™ Pro?
http://help.stackermarket.com/en/articles/5379034-what-is-stacker-market-pro
What is the fee to join Stacker Market™ Pro?
http://help.stackermarket.com/en/articles/5390773-what-is-the-fee-to-join-stacker-market-pro