I am still using the dented HP 12C my father purchased for me over two decades ago, as a graduation present. After so long, it is like a trusted friend that has helped through negotations, successful exams, and many financial decisions. Plus, the price has risen minimally compared to the quality. When my father balked at the price, $50 in 1986, neither of us would know how valuable it would be. Actually, the HP12C was a bargain!