CPU: Z80 @ 3.25 MHz (or NEC µPD780C-1 equivalent) Sound:None Display: 64 by 48 black and white. Some very clever machine code was able to generate 256 × 192 by overriding the interrupt service routine. Memory: 1K RAM (expandable) Software Media:Cassette.
Value: £40 - £50. It may be old, but isn't as rare as you'd think.