I agree with all of these, very rare. I have seen that Aiwa with mico cassette before and the Aiwa CS-X85 on yahoo.jp they are great !
But does anyone here have a Sanyo P6 ? I know there was a guy on s2go who had the fisher 470 a.k.a and seen one or two of those for sale in the US but nothing else !
A slight notch down in rarity but I have a Toshiba RT-9990SM, and I know only of 4-5 other people who have one. So not top 5, maybe top 20 rarest.
i know fisher also made a version of that sanyo.