WCIF a 2nd hand powerbook or mini mac?

Not wanting to purchase anything new, so looking for best place to locate a second hand one ?? unless anyone has an old unit lying around they want to part with for cash…

I’m testing an iPod HW solution we are developing and the test system requires a MAC… with the following spec “a Mac running Mac OS X Leopard 10.5.5 or later” and a single USB port.

Only need it to do some testing on, don’t really need anything powerful… so cheap… as it will be sat gathering dust once testing is complete. Ideally need small, because may need to lug over to China to work with the engineers. :pray: