The issue missing in other posts is the factor of age related failures. A single small capacitor failing can cause total failure of the CD player. (Easy to fix if you are a techie, but not worth it if you have to pay someone else.)
Also specialized parts in general for old players are NOT available. If you plan on buy, it breaks, toss! then you will be ok with an older player.
SO.. If you go for an old, high quality player, remember, it will not be worth, or possibly able to be fixed if it breaks.