The desk address is contact@tradingcardguru.com. It is a mailbox for the site, not an appraisal line, not a grading intake, and not a place to get a number on a pull.
A listed address is not a promise that a reply is sitting on the other end today.
Write if a page is wrong, a link 404s, or a face looks off. Include the URL. That is enough.
Do not ship cards to a site. There is no receiving dock. Unsolicited photos are not a condition report.