The Sinclair Spectrum! Yes, have seen those around, it's a legend!
Naah, the Spectrum was a couple years later, 1982/83 and comparatively expensive (and yes, I also had it, after the ZX81 and before the greatest lesser known computer of the time, the Sinclair QL in 1984/85).
The ZX80 was sold in a kit that you had to solder yourself (that costed a little less than the assembled one):
and was followed in 1981 by the ZX81 before the Spectrum (which was originally the ZX82, starting to see a pattern?).
Why, in my day...
https://tinyapps.org..._in_my_day.html
... and we LIKED it ...
... kids today ...
Wonko