Help with Vintage Brandy and Wine please

[Isabel]

I have three KWV wooden box collections which contain a variety of Port and Brandy. The boxes were given to me about fifteen years ago. some of the bottles are as follows: 1989 Stellenryk Cabernet Sauvignon, 1966 Light Tawny Port, 1965 KWV Limited Release Port, 10 year old KWV Brandy, 1972 Muscadel Jerepigo, Are these worth anything or shall I just open them and drink them?