Honda Insight discontinued? Parts?

One thing that concerns me about buying a hybrid, particularly a used Insight, is the accessibility of parts, especially since these cars are hard to come by in the first place. How do I go about figuring out whether or not I won't have to spend oodles of money, thereby nulling the savings in gas, for a rare part? Thanks.

Also, I was wondering how I can go about checking out the condition of a used car from a private seller.