I found my first one nearly 30 years ago... one of my shooting buddies got it in a bulk buy of an estate, IIRC and I paid him about $20 or less for it. Another friend, the late Jerry ("Jake") Simmons (he of re- and decapper fame) opined that he needed one since he had broken his Rockchucker. I found him one at a gun show soon thereafter and traded it to him for another of his re- & de's. I paid probably $25 or less for that one, but he was glad to trade me one of his units he made himself ( and sold for about $100) to have it in hand. My original is on loan now ,but it is still mine when I need it.
Froggie