If you post your location, you might have a board member nearby who can do a rudimentary appraisal/sort for you. I do free appraisals for people in the Florida panhandle.
Basically, if you've got base Topps cards from those sets, you can look most of them up in price guides to at least see which cards are stars or short prints worth selling individually.
As to grading, you'd have to post scans of cards you think are the highest graded. Here is a cheat sheet for how PSA grades:
https://www.psacard.com/resources/gr...andards/#cards All three grading companies are under fire right now for failing to detect (or actively looking the other way) thousands of trimmed/altered cards worth millions of dollars. And they're all (maybe SGC is not?) shut down currently because of the coronavirus situation; so their backlog keeps increasing and when they do get the okay to start working again,
For those years, you'd be looking at doing a bulk submission to PSA as your most cost effective and best return on investment if you do choose to grade. But unless the cards are truly mint, they are probably not worth grading.