Kenbak-1 computer - $4,999 - (Worcester, MA)
Kenbak-1 ComputerThe Kenbak-1 was designed in the early 70s as an educational tool. The prototype was first demonstrated at a high school teacher convention in 1971. John Blankenbaker designed this computer before there were microprocessors. The board uses 132 standard series TTL logic ICs as the CPU / process control logic and two 1024 bit shift registers for memory. Even though the computer had a 1MHz clock it only processed a few hundred instructions per second! This is because the Kenbak-1 has a serial architecture, it only processes one bit at a time!The system first sold for $750 and only 50 machines were ever built. Today only 14 machines are believed to exist worldwide, in the hands of various collectors. Production of the Kenbak-1 stopped in 1973.This is a modern replica meticulously recreated to match the original design. Every single component (except for power supply) is built per original prints. The motherboard is the same exact design as in the original machine. Needless to say, that it works exactly like the original machine.
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From ebay.com - 1 month ago