FWIW, when I was a starving student, I always haunted the out-of-date bins to feed the habit. A year out of date, stored properly, should be more than fine. My best find once was a roll of the old (1980ish) AgfaChrome 50, which still had correct color rendition 5 or so years later, after being stored in a sock drawer at my grandmother's. Lovely film; neutral rendition, low-contrast, and very natural. Shot it in the PA/NJ winter, and have some lovely, if very quiet, color pictures.