Should I sell my DAC

My Bluesound Node2i stopped putting sound out the RCA plugs about 6 months.  I bought a Qutest.  That sounded better, although very bright.  I forgot about the Node2i and just called them for service - 13 months after buying.  They want near $300 to fix it, so it is pretty much a paper weight.

I hear significant differences based on my player. Roon vs Audirvana are significantly different sounding (not tweaking settings) to the same DAC.

I have the red Firefly USB DAC and I don't think it sounds as good as the DAC in my Samsung Note 8 phone.  I sound better than my laptop.

I have the Fiio M15 coming tomorrow.  I'm kinda excited about that, main because it is new, but it has some new chips.

I also bought and sold the
-Fiio Q5 - good DAC.
-Fiio M11Pro - really good DAC, not as good as the Qutest - but more mellow.

The musical fidelity v90 dac is an outstanding little component for the meager cost of $299. It is a border line class A component in Stereophile. 

Used Bel Canto Dac3 for 600 bucks. 

To answer your original question, there are DACs in your budget that some would definitely consider a better choice than the OPPO, but there are also people would have the opposite opinion. Without knowing what you find lacking, I think any suggestions could accidentally send you down the wrong path. dgcustomerfirst

ghulimar
Think crappy cd player vs highly reviewed cd player, or,
a young boy before he reaches puberty. His voice typically deepens

hth