I may be in the minority but I feel The Hobby of Sports Cards would be just fine with minimum cost to grade MODERN at $500…but vintage at significantly less.
At some point it's easy to tell all these Social Media accounts have never played basketball or watched much...but are dang good at rage baiting with horrible takes.
If you follow Social Media accounts on how to grow your card business, sell in any platforms, etc…take into account they likely make the majority of the income from telling you how to grow your card business(partnerships, affiliates, views, etc) and not from flipping cards.