Jim MacKenzie wrote:
   Also, am I
right in thinking that the tape unit was an optional extra?
 I don't have one [1], but looking at the boxed plus/4 on ebay at the
 moment, it doesn't seem to include one either in the standard package. 
 The Plus/4 didn't come with any storage devices, but does work with the
 1531 Datassette.   
 
Yes, that's the critter... I think I've still got the manual for it, but I
have no idea if I've still got the thing itself.
  I actually have the Datassette for this computer, but
I lost the auction
 on the accompanying Plus/4.  Warning: if you plan to tempt me with
 yours, I'm cheap.  I buy this stuff to play with, not to collect.  :) 
:-) The machines seem to be one of those slightly odd classes of vintage
hardware - not particularly common, but not particularly collectible either.
I'm not sure why - I mean I know they had something of a bad rep at the time,
but I'm surprised they're not more sought-after these days.
I got this one just because something a little less common always appeals -
but then never got chance to do anything with it as my collection took off in
other directions.
(I've actually got a second Plus/4 to optionally throw in with this one - but
it's dead, and lacks a PSU, so is good for spares only)
I still need to hunt out the manuals too - they're *somewhere* :-)