I have a 608 ESD purchased new in 1989 that still works flawlessly. I also have an X77 ES that I believe is circa 1992 which I purchased used some 20 years ago for $350 that is used primarily as a transport which also works flawlessly. I also have the flagship X7ESD from 1989 which has developed an issue whereby the sound intermittently stops although it appears the laser is still operable as the track readout continues.
I agree with bgross in regards to the sound quality of the 608 ESD. It is still used as a stand alone player in a second system.
I appreciate the build and material quality of these players. How long they ultimately last is any one’s guess. Looks like I might find out unless I die first.