Welcome axc77.
A warning about catalogue values - they are the prices at which the stamp dealers who publish the catalogues will try to sell the stamps to you. Generally MNH (=mint never hinged) stamps sell for up to 50% of cat value - sometimes more if you're lucky, but often less (for example I recently bought a collection of MNH Australian Antarctic Territory stamps from a dealer for 20% of catalogue value).
The more valuable the stamp, the closer the catalogue value is to the true value. Once you have the Scot catalogue numbers, check
ebay to get an idea of what they are actually worth.
But hey, stamp collecting is a fantastic hobby - and these look like lovely stamps. They could be part of your own collection building on what your parents did!
If you do want to sell any stamps, get up to 50 posts and try selling (or trading) here.