Zooming in on the panel pic, the transponder is a KT76A, which is a compatible source for altitude data for the ADS-B out sniffer units (GDL-82, etc). One could run it until it dies, then replace it with a GTX-327 or comparable (what my A&P recommended I do, since I also have a KT76A).

I agree though, way, way overpriced. If I was interested, I'd offer $30k and hope the seller would "negotiate" to somewhere in the $35k-$37k range.

States I landed in N63420 while he was mine:
[Linked Image from visitedstatesmap.com]
KDCY

"Flying a plane is no different from riding a bicycle. It's just a lot harder to put baseball cards in the spokes." - Captain Rex Kramer