Jond boy are you wrong, we have consistantly found that newer dacs invariably outperform older ones and in many times the newer units are less expensive.
The Remiyo dac was superb in its day it is very likely that a new Dac like the Ifi DSD would just blow it away in terms of all the performance traits like imaging, depth of sound field, clarity and musicality.
Used to sell the Audio Note Dacs and they were impressively musical, howerver, when you hear really good digital you have both the musicallity and the resolution that makes music sound more realistic.
Then you miss the ability to actually go into a store or order a few different pieces and then see which one of these products sounds good
The used world means you are always chasing ghosts of what was good years ago, when newer value oriented dacs like Schitt, and Denefrips and IFI and T+A dacs would probably embarrass some very expensive dinosaur products.
Caveat Emptor, If we could afford it a brand new car would always outperfom the older model, sure the older car is older and cheaper but is it as good of course not in everything the world evolves.
Dave and Troy
Audio Doctor NJ