He's an excellent artist, thanks for the links. Concerning glaucoma, in addition to the regular eye drop approach, they can now do a laser procedure that can help lower the pressure a lot. My dad had it done and the improvement was pretty dramatic. I'm not sure if losing weight can help lower eye pressure, but it can vastly improve his overall health, although from that picture he doesn't look especially overweight.
Concerning vinyl records, after everything went to CD, people were giving away their old records. For a long time you could find near mint albums for $1, first pressings and rare albums. Now that stuff is through the roof.
Vintage concert posters are also great to collect, combining the art and music aspects, plus nostalgia and the historic side. However I lost some interest after learning how the CIA had supplied much of the LSD during the 'counterculture' years. Sounds crazy, but the basic idea (as now) is to screw up society, weaken the cultural supports of traditional family, religion, morality, etc. Makes sense if you are a revolutionary or are trying to build a 'new order', you first must break down the underpinnings of society.