Since today is my well deserved regular day off I decided to put on some vinyl to listen to. The usual ones I listen to are the ones that I have bought from Audio Affair- which are of good quality but I just decided to put my girlfriends old black sabbath album (we sold our soul for rock 'n' roll) & it just sounds fantastic! why is that? is it the pressing? I have some other old records that I bought cheaply from the second hand shop & they sound awful! Any tips to find those gems?