My favorites are Cube (1997) with a budget of $350,000 and Gattaca (1997) with a budget of $36 million.
I'll throw in Groundhog Day (1993) if fantasy qualifies. It had a budget of $13.6 million.
Sorry for being a necromancer but I ABSOLUTELY LOVE CUBE.
It's just a great movie and they should never have done those sequels. They made two and frankly they suck.
How did Groundhog Day cost nearly $14 million? was most of that Bill Murray's paycheck?