The cd-1 is no longer supported by ARC, just like the CD-2. The pickups are no longer available, so if it breaks (and break it will) you will end up with an expensive paperweight. If anything, look for ARC CD-3 or later - those are based on the cd-pro2 drive, which is still beeing made.
Buying top brands's older CD players: Pros& Con
I recently saw an ad in a magazine audio mark for a Audio Research used/good condition CD-1 CD player; i might be able to negotiate a lower price It was reviewed well in Stereophile in 2005, but in the high end business that is already ancient history. However, has anybody ever heard or owned this machine?? Is the technology of the model and its sound possibly been bypassed by the newer CD players of the last 3 years. The CD-1 first came to market in 1995 which makes me leery of buying; I currently have a Rega Apollo, but want to make a noticeable upgrade in sound, e.g, smoother highs, better bass and imagng Thank you