I woudln't be able to get any of those, because Dollars are useless here. I would have to use 50 euros (Europe, lol).
But to answer the real question I would get Final Fanatsy III because I don't have a Playstation 2 and even if I had, FF VII Spinoffs I don't care for and I would like XII but FF III is just... Let's say legendary. And I love the job system. So yeah, Final Fantasy III DS.