'Beaty is in the eye of the beholder' goes for pins like everything else. One man's junk is another man's treasure. I  still love playing many pre 1980 pins due to their rule simplcity and challenging layout.
By the way, I have a Flash which I bought from an operator in 1981 for $500. The machine has been in storage for the last 25 years. One of these days I will bring it back to life as it is all original.