Not an old film, but I love the score to The Legend of Bagger Vance by Rachel Portman, though the film is merely average. I saw it only once, in the theater, but it's a favorite score. Maybe I'll watch it again and see if my opinion improves.
Unfortunately, a quick check on Amazon indicates that it's out of print, and new copies are selling for $94. (Well, whether they're actually
selling is unclear, but that's the
asking price anyway.) And it's not available as a digital download (legally, at least). The entire thing is on YouTube though:
Main Titles (track 2 on the CD because track 1 is a Fats Waller tune):
http://www.youtube.com/watch?v=-Jat7sPZyhE&feature=relmfuAnd here's a compilation:
http://www.youtube.com/watch?v=WULPWcVmJeQ&feature=related