old vanilla beans
of course! the flavor may be a bit muted, but they're still fine. if they're really dry, use them to make syrup, or in a recipe that requires them to steep or simmer in liquid for a long time...or if you're a drinker, you can flavor a bottle of vodka or rum.
there are threads here on the HC board with plenty of suggestions for what to do with them and how to do it - a quick search should get you what you need.