Unique versions, such as the California 500 Specials and the 52 Hurst-modified SS/AMX drag race cars are perhaps the most highly sought after by collectors.[1] In 2006, a California 500 AMX sold for $54,000 at the Barrett-Jackson auction in Scottsdale, Arizona, while a regular AMX went for over $55,000 at the Mecum collector auction in Belvidere, Illinois.[121] In 2007, Hemmings wrote that only about 39 of the original SS/AMX turn-key race cars may have survived.[122]