Marcos Maniacs

Hi

I found this group earlier tonight when looking for links or info on 
Marcos cars for my father.

My father, who lives in Canada, is thinking about selling his 1970/71 
Red Marcos Mantis (right hand drive) but has no idea what it might be 
worth? I believe it is a rare model with only about 30 made. It has a 
Triumph engine. He bought it new in 1970 when we lived in the UK and 
shipped it over to Canada, when the family emigrated there in 1975. 
It has been well looked after and maintained over the years and is 
still in very good condition and still used from time to time (summer 
only) on the roads in and around Calgary.

It's the same model as in the pics posted by Ron McLeod.

Any advice or suggestions on the price he should he be asking would 
be appreciated.

TIA
Carol