I grew up in the seventies and to my knowledge unseeded grapes did not exist. If they did exist, we were not aware of them and certainly never had them. I am not sure when seedless grapes came on the scene to stay and become the grape of choice. I would say they became very popular in the early nineties . I actively search out seeded grapes and only purchase unseeded when I am craving grapes and seeded aren't available. There is nutritional value in the skin of the darker colored seedless grapes (I don't bother with green grapes) , the rest of the seedless grape is mostly sugar. If you buy seeded, you get the nutritional value of the skin and the substantial nutritional value contained in the grape seeds themselves. Grape seeds are packed with antioxidants, amino acids, EFA's and flavonoids. They are a great aid for cardiovascular problems, your skin, varicose veins, perhaps even depression and some cancers. Just make sure you chew them to reap the benefits, and make sure your grapes are organic. If you spit out the grape seed, you are spitting out the best part of the grape, and if you buy seedless, you are paying a lot of money for an inferior product with inferior nutritional benefit.