If you HAD to purchase a used (over 4 years old) DAC, what would it be?

I think anything in the last 10 years is a lot better than anything before.  To answer your question, I really wish Bricasti lost their value faster. 

Mine are similar to one listed already: Lampizator, Weiss 501, Aqua La Scala. 

I’d love to have a DAVE or the 501 to use alongside my Lampizator. 

I have a Weiss DAC202 which is about 12 years old, I don't have any intention to change it anytime soon.

How is one supposed to make a recommendation when nothing has been shared about what the DAC will be playing with or your listening preferences?

Knowing your whole system and preferences would be very helpful.

The OP is asking, "if YOU needed a DAC and HAD to choose a used one, what model would YOU buy."

If I needed a DAC, I would be on the lookout for a used T+A DAC 200.

Bricasti M1 upgraded to the M1S2