I had my A1200 hooked up to an ancient PC PSU, which I unsoldered the connections from my Atari ST in order to use it on the 1200 :-D
(by ancient, I mean it came from a junked PC my uncle had in order to replace my dead ST PSU, and that was back in '88 or summat)
WHen my 1200 PSU died, they wanted 120 quid for a new one. Having seen inside it, I can't believe it was ever worth that, even a hundred years ago...