Not sure you necessarily need to resort to an older or used DAC. A new Topping E30 DAC with separate P50 power supply would be less than $300 and give you great sound. Best of luck.
The Schiit Modius 3 at $199 might be worth considering. Has single-ended (RCA) and balanced (XLR) outputs. AudioScienceReview tests and user reviews have been favorable. No risk 15-day return policy.
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