Well, this is just my opinion. I started getting cards graded when PSA
started and now I have quit. As for your 80's or 90's cards, don't waste your
time. Even if you get a 10 you can probably buy a 10 for less then
the grading and shipping fees there are so many out there. I was
sending in my 70's, late 60's cards and you just can't grade them against
the cards being made today. Beautiful cards centered, great corners
measure perfect come back 5's & 6's maybe an 8 if your lucky.
Then you look at ebay and I couldn't sell them for the grading and
shipping fees and that's after waiting months to get them back.
Just my opinion