What is the value of 1981 crown royal whiskey?

To tell you the truth, possibly less then a bottle of crown royal whiskey costs today. Unless someone was particularly interested in vintage early eighties liquor packaging. You're looking at a blended Canadian whisky, and those have never really been big money makers. I assume that your thinking was, "Hey, this is a thirty year old bottle of booze, that's got to be worth something, right?" Well, sorry to say, unless you're looking at a top shelf scotch or a very nice bottle of wine, the age doesn't matter all that much. That old crown certainly won't kill you, so I suggest you and a buddy have yourself an evening drunk; and, if you really like it, save the bottle. Sorry if the answer disappoints you, but it ain't a bad deal either way. Use the liquor as God intended.