Congratulations on where you are.
What is your system? There is a place to put photos. Very helpful. What turntable?
I started collecting in the 60’s as well and continued through present. I was shocked that when cleaned and with an audiophile turntable most of my early albums sounded spectacular… maybe one in a hundred with a skip on them. I attribute their spectacular sound to my stylist going much deeper into the grooves than my Sears portable and cheap junk Garrard at college.
I buy from a local used record store where I can carefully examine the record and typically after clearing they are flawless. Also, for classics I was shocked over the last twenty years how audiophile pressings have come out on my very favorite albums of the time. Music Direct is my normal place to buy those. But read reviews… not all audiophile pressing sound great. Some are terrible… 10% - 15% maybe.
I have not had great luck with Amazon and misc used through the mail suppliers.