I bought this demo model M902 from Vintage King 3 weeks ago. It was sent from VK directly to Grace to have the Balanced upgrade done to it. It is now an M902B. Before Grace sent it to me all updates were preformed and it was completely tested and burned in.
It's a fine quality HP amp + DAC. Noticeable improvement in top end clarity over my Apogee. The feature set and build quality are hard to beat.
Unfortunately, a family matter forces me to have to sell some gear. Bottom line is, although it's used, it's really like new. (also cosmetically) W/ Grace shipping box, manual, cables.
$1300 + shipping. I'll absorb Paypal fees.
http://www.vintageking.com/Grace-Design-m902B-Balanced-Output-Version
