why not get in a rare brand itself rather than a rare car. We have ferrari's, nissans , lambhorginis, aston martins , dodge et all but i guess we dont have many maserati's or alpha romeos around in india.
How about maserati GranTourismo or an alpha 159 or spider. I am not sure about the maintanence and import issue with these but check out this link for the alpha
Alfa Romeo models: cars with a sporting heart