Seems like a good deal for someone...

http://cgi.ebay.fr/AIWA-Casset...;hash=item256ccf228c

wow these really go for this much even in a non-working state?

is this one a particularly collectable Aiwa?

Yeah, beyond the realms of Back To The Future lunacy these are quite collectable, this isn't in bad shape but the belt change process is legend.   A clean unboxed working J600 is £200 territory