Looking over the titles in our DVD collection, I've found that the only Tracy film we own a copy of is MMMMW, which I dislike. Given der Brucer's penchant of late for finding DVDs in the bargain bin, this can only suggest one thing, that Tracy and Hepburn are cherce, not cheap.
We do have Lion in Winter on laserdisc, one of the great films IMO. Love her, love him, love the score, love the scale of the film.