I always think that 'vintage' in hi-fi pretty much ended / declined when analog transitioned to digital displays. I guess a lot of that occured around 1978-80. CD players came along in 1982-83? Many of the affordable early models in the mid to late 80's are not known for great sound (always exceptions I suppose). Reliability is another factor to be considered with elderly CD players. I have a lot of vintage audio and when it comes to CD players I just try to match the styles and finish (silver or black panels) regardless of the year of CD player production (newer almost always preferred). With the older CD players that lack ideal sound quality one can always upgrade circuitry; for example, some older CD players can be upgraded / adapted / connected to add on DACs. Others might think the vintage age ended about 1962-64 when tube gear faded in favor of solid-state!