Here's a silver 20 franc coin from Switzerland that I picked up at the coin shop today. From what I understand, it commemorates 700 years of Swiss confederation, and according to NGC, only 641,553 were produced. I paid $21 for it, which, interestingly enough happens to be its face value. Edit: If anyone knows, are these actually legal tender?
You might find this relevant @Legomaster1 concerning the legal tender status of Swiss commemorative coins. "In addition to these general-circulation coins, numerous series of commemorative coins have been issued, as well as silver and gold coins. These coins are no longer legal tender, but can in theory be exchanged at face value at post offices, and at national and cantonal banks,[52] although their metal or collectors' value equals or exceeds their face value." https://en.wikipedia.org/wiki/Swiss_franc