Radio, Mode S transponder, intercom, ELT, Dynon Skyview glass panel with engine instruments, synthetic vision, terrain, GPS, and traffic alerts showing altitude above and below your altitude and direction of flight, apparent wind at your altitude and speed.
Coupled autopilot $2000.
Bauman amphibious floats $31,000.
BRS about $6000 installed.
Tundra tires and heavy duty nose gear.
Any paint job you desire, probably at no extra cost.
Aluminum except for control surfaces (fabric) and part of the wing surface and flaperons. Cowling is fiberglass.