Removed my 530 for sale. Keeping it for now.
Mark, what made you decide that? No big deal, just curious. Is your other one giving you problems?
When I had a plane with a KNS 80 installed, I always had a spare (or two), and I was glad more than once that I had the spare. When I sold the plane, I gave the new owner the spares. Parts for older avionics are ever harder to come by.