Check the usual listings and see what's offered that's commercial and may need "wrench time." See if you can find that model discussed on one of these boards, including maybe what's involved in restoration, parts availability and such. I found a commercial machine like that for a great price, checked out whether it might be worth getting by searching mentions about it online and am now restoring it. This one takes lots of work to restore, but it's worth doing because that machine in working order is very desirable, and I find the restoration process interesting in and of itself. See:
Conti Prestina Restoration. A review of some of the other restorations being undertaken in the Espresso Machines forum will show you additional examples of making up for lack of money with sweat equity.
