gonglee3
I want to upgrade from USB DAC to stand alone ones for a few hundred $ - which older DAC should I hunt down on used market?
Go for a good use R2R Theta Audio dac (Mike Moffat designed most of them) and now owns Schiit Audio which has some good new R2R dacs also.
https://www.audiogon.com/listings?q=Theta
https://www.schiit.com/guides/choosing-a-dac
Cheers George