Or submit through PC Sportscards to PSA.
https://www.blowoutforums.com/showthread.php?t=1400125
They submit tens of thousands of cards to PSA monthly in group submissions and have excellent references. Otherwise, you do it yourself with a silver membership that gives you personal access to submit bulk specials, but as you know, the wait is forever.
And there's the whole supporting PSA thing... but in terms of resale value, that's what the sheep want.