Well, stamps that are shown vary from very common to not so very common, but nothing of any significant value. Judging by the selection presented, there could be more interesting stamps in the collection. An entire collection as 1 lot probably worth about $100 - $200. This is what you'll probably get on
ebay or from a stamp dealer. You can make more if you start breaking them into sets, but then you will need to know their catalog numbers Scott or Michel. Catalogs are not cheap. If you keep them just for the sake of keeping them, their value will not go up, but quality may deterioration if stored poorly. Or you can become a world wide stamp collector, and spend most of your free time with enjoyment and enlightenment for the rest of your life. You decide.