I remember ESB being a bad player even at the age of 10 (which is saying something), but, with only 350 being made and and absolute ripper to look at, I think it's a big prize to own if your'e are Star Wars nut (i'm not).
I don't know much about Star Wars merchandise but ESB will always be a sought after item IMO. I'm surprised it doesn't reach the prices that Kiss gets. Kiss is a better player but i reckon these types of machines are ornaments rather than games to the fans.
I think cause it's Oz made and perhaps not so known to the entire Star Wars fan universe, the wanting for this machine will grow, it will not lose value. My 2c anyway.
I also agree that ALL pinballs are fun.