The Sting
This classic starring Paul Newman and Robert Redford is one of the greats. At this writing, it sits at #82 on the IMDB Top 250 List (an accomplishment in itself), but moreover it’s one of those movies that stands the test of time.
Perhaps part of the reason is that the movie is set in 1930 – so the fact that it was released in 1973 isn’t as much of an issue as some other more recent movies. It’s still going to seem dated. Perhaps more importantly, the storyline isn’t so dependent on money (though some of the sums certainly seem less and less significant each time I see the film) as it is just a good caper.