There are a few prairie rattlers on eBay that are dried not tanned.
I used to buy all of mine from a dealer that went by bsktcas , he sold matched sets of very good skins of $25-$30, last time I checked his sets were over $50.
His store was called Skins N Scales, he doesn't have any up for sale now but probably will after the rattlesnake roundups start out west.