My latest addition from the amazing world of ebay, is a Gama Sea Ranger. The Sea Ranger was originally designed by Luigi Colani and appeared at the 1979 Essen Motor show, based on a Unimog chassis.
The model is around six inches long with a diecast body, gull wing doors and opening roof panel. Designed as a recreational amphibious vehicle, the sea ranger comes with a large antenna array and detachable sports seat.
Oddly, Woodsy gave me a smaller 6 wheeled version, some time back, but I didn't recognise it!