 Quality Comics characters such as Max Mercury (known in the Golden Age as "Quicksilver", and named such on the wraparound cover of DC-11), the Black Condor, the Ray and Doll Man made their first DC Comics appearances in these books.While the books languished in relative obscurity in the collector's market for the first 20-odd years of their existence, their "Overstreet Comic Book Price Guide" estimated value from 1973–1995 did not exceed $3.00, these comic books - particularly the first three issues - have become some of the most sought-after Bronze Age books.Their "Overstreet Comic Book Price Guide" estimated value has increased from approximately $45.00 to hundreds of dollars each in the 1997-2006 editions.