I got the scoop from Pulsar. Pulsar is discontinuing their use of the BAE sensor in the XG product line. In the future, the XG models will use a sensor from Lynred. They are running sales on the BAE version, and many dealers are as well.
If a person wants one of these, this is the time to get one as they soon will be gone. If something major goes wrong, and the unit needs replacing, you will probably not get a BAE unit again as they won't be available. I haven't seen a $3,500 price but I have seen a few places offering them for under $4K.