Welcome to the forum JBL. Unfortunately, in the USA they are not exactly highly sought after by collectors and numismatists. The colored, enamelized (if that's a word) coins are not produced by the USA mint, but an after mint enterprise. Most that purchase these coins are novice to first time collectors and like the "art form" but not really cognizant of collect-ability of the product. They are worth in the US at what the market will bear.
Some Royal Mints, Canadian, Australian, and New Zealand, have produced magnificent enamaled and bi-metalic coins that have proved very collectable.
Enjoy your membership in the Forum.