I am the founder of the North American Pachinko Club on Facebook. I own 4 machines at the moment, they are a LOT of fun.
Insane features and light shows. Not much skill needed (they are gambling machines in Japan). I would look at them as a ultra advanced, interactive part of Japanese culture in your own home...
I have also figured out how to make wall mounted wooden cases for them, the light shows in modern Japanese pachinko are second to none. You can normally score the machines for $500-$1200 depending on the title and features. A great conversation piece.