I have N695AB listed for sale. It's $1,325,000 ask and now has the GTN750 and more. It's a great plane. If you'd like more info, please let me know.
Since I certified the Meggitt in the first installation circa 1999 (N690RC at the time), I'm quite familiar with the pros and cons. Bottom line is that it's a great Garmin G600 type upgrade to candidate if you want the latest. The current owner bought it with a plan to upgrade to a G950 but frankly, the avionics work very well and have proven reliable for him. His flying needs have changed so the plane is for sale.
I'm the first one to complain about poor Mfg support. Fortunately, Cobham sold Stec back to Managment in 2014. The remainder of the system, things like Cobham ADAHRS, may give an owner something to complain about. Ironically, the last time I had a failed ADAHRS, I was throwing a minor fit about the $14k price and unreliability of the part but the parts expert just chuckled and reminded me that it had been 5 years since we last sold one. Considering the dozens of installs supported, even I was surprised. It's certainly no G600, but it works and more trustworthy than an FD112V crammed full of hundreds of moving parts the soup anyway.