Perhaps one of the most respected Macs ever built, the Mac IIfx was dubbed "wicked fast" by the industry press. It reigned as the top-of-the-line, speed demon Mac until the introduction of the Quadra 700 in October 1991. In addition to its blazing 40MHz processor, the IIfx touted a 32k static RAM cache -- which also contributed to its then amazing speed! It's code names? Stealth, Blackbird and F-16. Current used market value of a 4/80 configuration: $165