Mattel Intellivision

Specification:

CPU: General Instrument CP1610 (16 bit) @0.894Mhz
Graphics: Resolution - 160 x 196. 16 Colours. 8 Sprites.
RAM: 1456 bytes - 240 x 8-bit Scratchpad Memory, 352 x 16-bit (704 bytes) System Memory, 512 x 8-bit Graphics RAM.
ROM: 7168 bytes - 4096 x 10-bit (5120 bytes) Executive ROM, 2048 x 8-bit Graphics ROM.
Sound: General Instrument AY-3-8910 - three channel sound, with one noise generator.
Game Format: Cartridge.

Value: £17 - £50, depending on condition and games included.