L-Nav & Model 20, What's It Worth?

I paid $2000 for that package, but you must have the GPS display and the vario.
Without that stuff, the package is unusable. No way to get GPS guidance to the
turn-point or to see what the air is doing. I love the Cambridge GPS, but my
first one is now 9 years old and the internal battery just gave up. That is the
only failure I have had and I own 3 of them. Wish I got that kind of
reliability out of my motor-homes. Have had 3 of them and blew a transmission
in less than 1000 miles on the Ford. Lost 3 catlitic converters (she won't run
when that happens) Blew 3 tires, blew an exhaust manifold + all the normal
small stuff that never works on them.
JJ Sinclair