Because some of us are looking for an additional NEW CD player (a streaming will not happen in my lifetime where I am at, the old CD players have been rebuilt several times, the parts are getting hard to find, people that can work on them are getting hard to find, etc) and a new one is, well, new.Why scramble to pick the least damaging alternative when one can find better measuring old CD players for almost free everywhere? The key is to have measurements.
In my case I will also be looking for a NEW CD player & a NEW (never had one before) SACD player (yes, 2 separate items).
Also, maybe an older one or 2.
Not everyone only has only one home to have gear in (I do the downstairs stereo & the upstairs stereo at my mother's home, and I always have 2 to 3 systems at my own homes (one more or less in the City, one on a river [where cell phones & therefore streaming] have no signal.
The City home is not owned by me but is owned by my family. It is not a place that I like to be (which could be any City). But these days I have to spend a lot of time there, as it is within 12 miles of my mother's home (she is a very active 90, swims, and does other fitness things 3 or 4 times a week). But, I am an only child & was overseas for 17 years (and have a wife, a son & a home [with a stereo], there).
And, finding the better CD players is through knowing which ones are, in FACT, better (old or new).
Knowing the good old ones, maybe you luck up & find one at a thrift store, estate sale and by knowing the way it tested, you may get a very good one inexpensively.
Or maybe not.
Some people know what they have & it will be priced accordingly. In which case a new one is certainly a possible choice, if you need one to last 30 years or so.