I have recently gotten excited about the cool mint sets. Not only do they make great gifts but they can be good investments. Now this article does not cover every mint set ever made but it gives you some good wise advice. You could  also start reading books like, United States Proof Sets and Mint Sets, 1936-2002. This is another way to learn more about mint sets.

 Now, take a few minutes to read this information post by Ms. Headley on ways to decide which mint sets are a good investment.