This is Audiogon, not a dealer's website. Wait for a relatively good deal on a DAC you are interested in, buy it, and if it's not clearly better, put it back up for sale for around the price you purchased it for. If you take a small hit, so be it.
I had a modded Benchmark DAC1, Havana, and Chord TT2. I didn't know what I was missing until I got a Merason, and now a Bricasti M1. There's no way I can go back now.