Some coins are at least somewhat valuable in any form because of their overall rarity. Others are so common that you can get them for face value pretty much anywhere. Copeland said that while the quarter sets had some potential as collector's items, any individual value other than sentimental would be determined by how many people stuck with collecting them, coupled with the number kept in circulation. I believe that you have to do this as a hobby, not as a business or investment venture, if you really want to get anywhere. You have to do it because of the appreciation you have for coins as art objects and pieces of history.
Some coins are extremely valuable.
Others prefer to find a good dealer they can trust, while yet others prefer to trade with members of local coin clubs. Coins are also branded circulated or uncirculated and then further graded on overall quality depending on circulated status. Coin collecting is a hobby that that can cut across age barriers, and indeed most collectors started either when they were children or relatively young. You can derive so much enjoyment from the hobby, and it's in many ways a constant learning experience. There's nothing finer.