My first home computer was a Heathkit -- I don't remember the model number. That was around 1979. I indulged in a IBM PC/AT when those first came out (maybe 1982). It was quite expensive at the time.
I have a Heathkit, which hasn't been run at all since somewhere around 1990. I had bought it from a friend somewhere about 1987, and a few years later replaced it a clock-doubled to 66 MHz (IIRC) Gateway 486. I think about 2 weeks later, the Pentiums started coming out.
Anyway, I think the Heathkit originally was clocked at 4 MHz, but had been souped up to 8 MHz. The CPU is a 8088 (not 8086) and it has a 10 MB hard drive. I added a math co-processor to it so it could run AutoCAD version 9. You could just about take a coffee break during screen refreshes.
I still have it, but it's been stored in non-climate controlled conditions, so I'd be very surprised if it at all ran anymore.
Moose