Up for sale is a like new Astell & Kern SE300, the first R2R DAP from A&K and one of the best implementations in the market. The DAP has almost not been used (less than 10 hours) because I have other DAPs and dongles. It never left me home and has been very carefully taken care of. Plastic film is still around the frame and I put the screen protector since the first second.
This DAP provides a sublime sound, the best I have heard so far, even better than the flagships I had such as SP1000 and SP2000. The sound has all the magic of an R2R implementation: warm and holographic with a very powerful bass, mids to die for and very airy highs. You can distinctly hear every note. If you are looking for a DAP that sounds different than other DAPs in the market, SE300 is your best option
I am selling it because I only listen to music when I go out, so a dongle is more convenient for that, even though the difference in performance is huge

SE300 is sold with the official leather case (MSRP 120 euros) that is a like new condition too