I'm pondering buying a roughly 50-year old one pound tin of Blue Boar, as Morley's Best is one of my favorites. The price isn't too obscene, and it appears that the seals are all intact (no obvious signs of rust, spots, etc.) My question is: Would a burley blend that old be worth trying? I doubt it would age as well as a virginia based blend, but I'm also not sure if it would have degraded significantly. My experience with burley blends (at least those without a lot of topping) is that they remain pretty stable, but I've never tried any with more than 10 years old.