While unboxing after a recent move, I discovered a Sony D-5 portable CD player. I had bought one of these brand-new in 1985, then sold it off a bit later, then bought this one used about 10 years ago. This really is not a unit suitable for "walking" or "jogging", it has a separate power-supply unit - and this particular model does NOT bear the "Discman" nomenclature.
Anyway, even though this unit is 28 or 29 years old, it still plays! I have read numerous reviews on the Internet about the sound quality of this unit - some regard it as awful, some as satisfactory, a few as very good. IMHO the Sony D-5's dynamic range is a bit compressed and high-frequency information is somewhat rolled-off. [NOTE: My comments here are specific to playback using the RCA output jacks connected to my regular stereo receiver and speakers, not necessarily applicable to headphone use].
If any of you are familiar with this venerable unit - or maybe you still have one at home in working condition - what are your opinions of it? Is it old enough to become a bit valuable as a collector's item?