10 Apple II
Unlike the early Apple I, the Apple II was a fully-assembled, personal computer. It was released in 1977 with a 1.023 MHz microprocessor, a whopping 4 KB of RAM (configurable up to 48 KB), and a casing designed by Hewlett Packard’s Jerry Manock. Programs and data storage were handled by audio cassette tapes.
Originally the computer also included two game paddles that violated FCC regulations. As a result Apple later excluded the paddles. Later the company added support for the Disk II disk drive, which allowed it to read and write to 5 ¼ inch floppy disks. In 2011, a working Apple II sold for $6,100 on eBay.