Amstrad 6128 plus - 1990
source: PixelatedArcade
seen from Italy
seen from United States
seen from Türkiye

seen from United States
seen from United States
seen from United States

seen from United Kingdom
seen from United States

seen from Sweden
seen from United States

seen from Netherlands
seen from Saudi Arabia

seen from United States

seen from Indonesia
seen from Brazil
seen from United States

seen from China

seen from Türkiye

seen from Germany

seen from Sweden
Amstrad 6128 plus - 1990
source: PixelatedArcade
Sinclair ZX-81 (print ads in USA)
The Sinclair machines were among the cheapest (especially in the USA), the second machine, the ZX-81, was a great leap forward from the ZX-80.
Therefore, the price also increased, but it could be purchased optionally in a set at a price of $99.95. In 1981-82, this price was quite 'ridiculously low' - just for comparison: Atari 400 16Kb was $329, Atari 800 was $699, but even the Texas Instruments TI-99/4A, which had been devalued due to the market crash, was $379.
ZX-81 was not successful in the USA, but it managed to sell 1.5 million units in the UK and EU (mainly due to its price).
Inside Technology...
Super Brain QD Computers, Intertec Data Systems, 1981
The Most Sophisticated Computer System...
Packard Bell Computers, 1989
“Train it to do your bidding. It even tells fortunes!”