> I’ve also seen V.S.O.P. on bottles of balsamic vinegar.

I went to a restaurant a little while ago that serves balsamic vinegar with salads, soups, and even on desserts. They drip it with a pipet from a small barrel at your table. Tastes good, but not good enough to purchase it from the restaurant for around US $250-300 a litre. I think it's about 20-25 years old.