1963 vintage ports

[rsurge]

I have a slew of 1963 vintage ports-Warre's & Taylor, but I can't seem to find any information about this vintage and its' current value anywhere. I have sold all my personal 1977 port collection and was probably taken severe advantage of, but I do not want to do this with my 63's which I have carefully maintained and treasured for years. Why is it so impossible to ascertain its value?