Bought one... Still got it...
I bought a Scrumpi kit. £60 for a kit was a very large sum at the time.
Power supply not included. You had to program in binery since both data and address buses were shown by LEDs and data set by switches. I wore out the right hand “Step” switch.
It eventually ended up in college in a Differential Pulse Polarography rig.
It had a very expensive 12 bit A/D converter and an 8 bit D/A (output to a chart recorder).
I interfaced a bought-in board so that I could record/read data from a cassette recorder. I sent off to have a 32x8 PROM programmed which was used to boot from. I expanded the memory with SRAM on a bit of veroboard. I think to 1.5k.
The whole lot was self-funded from my grant (remember those!) as none of my lecturers knew WTF I was on about.
Still got the whole thing somewhere. Must find it and see if it still works…