Well, most of my collection was free. So if he was patient, he could probably have amassed a lot of that for free. The imacs possibly not, unless perhaps he worked as an outfitter for school/university computer rooms :-)
About 18-24mo ago OUCS were chucking out their tangerine G3s for about £15 each, IIRC. I wouldn't be surprised if you now could get free G3 iMacs, if as you say you know whom to ask.
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