Let's see...
My C64 blew a chip about six months after I got it (fixed) then the p/s went south (sold it to someone with a C64C that was going bad, so he had a p/s but no computer).
My A500's CIAs blew about a year in, as did the r/f modulator. Fixed, kept on chugging until my A1200, which kept on chugging until my PC (486/100) which I blew up (badly constructed on my part, no real problem with the PC itself :-( ). The dx2/80 I replaced it with kept going for quite a while; I've had a number of other PCs that I had for 2-3 years that (AFAIK) are still running, just in the hands of other folks (sold/traded/given away when I upgraded).
