I love all the proof DCAM silver 1999-s to 2019-s silver U.S. coins. They are not really high dollar and I think they are beautys. Here is my old poot question. Should I be buying them raw or certified? My SSI check dictates that I stay on the lower end of the prices in my collecting. I hope the heck I haven't asked this before. My wifey of 51 years thinks I'm nuts over these coins anyway. LOL
The sets in all original US mint packaging are easily available. Or were you looking for graded coins?
For example: Not all are that cheap. But I think only the 2012 and 2018 reverse proof carry a high premium.