How much is an old bottle of canadian club whiskey worth 1966 unopened?
If you can find a buyer, $70 tops. The problem with valuation is that whiskey ceases to age after it is bottled and Canadian whiskeys in particular are blended, meaning that there would be no special variance that would make one year preferable to another. In fact, I would not be surprised if your 66 tastes the same as a recently produced bottle. It should be perfectly drinkable, and that’s what I would do with it.