Is it a good idea to buy CD players over 10 years old even it is a reliable brand?

As above, those NAD cd players from the 1990's are still very good for RBCD.  Grab one while they are available.  Merry Christmas!

Happy holidays to all of you.
I would like to establish that I was taking about the lifespan of a single model, (for how long we at Gryphon normally keep a model in production), and not about the actual lifetime of a product. Hopefully the lifetime of a product should be way more than 10 years. Wishing all of you Happy Holidays and all the best for 2020 and thanks a lot for raising an interesting topic here at the forum.

With kind regards,
Rune Skov

A local hifi dealer who has been in business since the 1940's and still going strong told me that when it comes to Dacs, CD players that you should buy new because of the advancing technology. The exception of course are preamps and amplifiers as many of you know they have not advanced that much since the early nineties plus some of the older units are built better and sound excellent. I do have an older CD player from the early nineties and I have kept it because it works good with zero problems and sounds dynamic but I think I could do better with a brand new unit.

Your dealer might have the purest intentions but he is wrong. A good cd player is much like a good turntable, it ages well and can have qualities you`ll hardly find in newer players due to higher focus on oversampling, cheaper drives, smaller components a.s.on.