That's what a lot of these other Audiogon members love. Snake oil. This DAC thing isn't new, but add it to the list of things that are killing this hobby.
DAC 'Scam' Vid
https://www.youtube.com/watch?v=7Sg1nYLmLCw
The TL:DW is that any well made Dac should not be more than $200 and anything above that doesn't sound any better since they all use similar cheap chips to do the D/A conversion. Anything above $200 for a DAC is basically snake oil and theres no improvement in sonics.
Appreciate your insights.