All interesting comments and opinions.
Here's another arguable view: If we want our soda machine values to hold or increase I think we need young people to become interested. We don't want it to become an old guy's hobby like jukebox and cash register collecting ( I own both). Machines like this 39 catch the eye of younger generations.
I'm 35, I don't see classic soda machines to be a hobby that'll become extinct unless they stop selling bottles that will fit. Many guys want a man-cave, and the soda machine unlike a jukebox or a cash register serves a good purpose.