Hello, Caleb. There are quite often native silver collectors gathered to bid upon the frequent raw silver specimens advertised on ebay. Their search function is quite simple. Good Luck with your collection. I myself, have a source of pure silver crystals that are very unique, like snowflakes, no two of them are exactly alike. That person is an eBay seller as well but they don't list them very often as they are pretty darn rare, so they aren't cheap.

Good Luck!

Megan Rose, Author