On Friday, December 19, 2014 8:19:50 PM UTC, wrote:
So if a new ClearNav II is only $500 more than the old ClearNav, why is the upgrade of an existing ClearNav $1000?

Assembly of new hardware is a comparatively orderly and predictable batch process. Upgrading equipment that has been out in the field is a much less time efficient process even before technical issues arise.