Happyinflorida,
Welcome! That is quite a collection! The photo isn't really close enough to see the quality of the pearls, but the Mikimoto would likely have the highest value, because of the brand. Based on their age, all of these would be Akoya pearls. They would not have a high value. The mix of sizes and slight differences in color would make it difficult to use them in one necklace. Were these gifts from parents? Grandparents? They have lots of sentimental value, probably.
Are you thinking of selling them? Beaders and crafters often use smaller amounts of matched pearls like these in earrings, bracelets or a centerpiece of a necklace, or mix them with other gemstones or pearls. Is there anyone in your family that would be delighted to wear these pearls if they were made into a more modern piece of jewelry? (Just thinking of the upcoming holidays.) Or if you like to do crafts, bead stores in your area may offer classes.