Garmin pilot asks about cabin pressure in settings for the gdl-39 3d, too, so I kinda suspect the stratus has nothing on it. What do you want for it? I don't see an asking price listed, just the retail.
Just a note: You can have SV with the Stratus2 (I have one, and use SV all the time). The major difference in the 2 and 2S is the addition of the barometric sensor.