Go for it, it's a 2l NA aspirated engine so nothing much out of the ordinary compared to other NA engines so maintenance should not be a problem, it might be a little thirsty but with that light body it should not be much of a problem either.
It is not a steal at 75k but it is not a bad price either considering that the normal 1.4 and 1.6 Fiestas are around the 60 to 70k price range.Check and inquire as to whether the cambelt has been changed if it uses a belt, other than that I don't see any compelling reason not to buy it.