back in 2001 i got alto 460k (A/C) and my cuzine got mehran 320K (no ac ) both cars are on petrol
(both cars compareable to the new and having no known problems)
one month ago they sold it for 265k and our car also supposed to be sold but we got price no more than 260k.
so the lesson is only mehran got resale.
i think the second hand alto 2004 model will cost you around 330k its a good value in this money you can take benefit of ignorant market. but again i will say cuore is better. you gotta consider other options may be vitz