The C64G is considered an uncommon item in the C64 community, considering it was only released in limited European countries. I recently picked up a working unit for my C64 hardware collection, a very nice color to these C64G. Curiously, I already had the actual keyboard in one of my C64C units.
A similar hardware find would be a 1570 disk drive, the single sided variant of the 1571. Even rarer, for people outside of Europe, is the C116 computer w/1551 disk drive. I'd have a setup now, if the shipping from Germany wasn't more costly than a flight.