Heck if I know. The price was right and with the exception of the one disc all were in what I would consider excellent conditon. In doing research trying to figure out what I want to get for a turntable I've seen a fair number of references to cartriges and stylus for 78. I will likely get a reconditioned Dual from the Turntable Factory. In looking at Duals on e-bay trying to figure out if I wanted to gamble on an unreconditioned one the 1200 series seems a whole lot more popular than the 500 which has better stats. The 1200 series has 78 while the 500 doesn't.
I saw there was enough interest to pick up a couple and see what hapens. If I get my money back I'll be happy. If I make a few bucks I'll be happier.
Le