Hey,
I am putting my office system (except for speakers) up for sale.  I just feel it is overkill for how I am using it and I can use a new set of wheels for my road bike. 
Anyway I am the second owner of each piece of gear.
Parasound P3 preamp.  All analog and a great piece.  I have the original box and remote. $450 + shipping
Parasound A23 amp.  Original box and super condition.  I am not aware of any scratches on either the amp or preamp.  $550 + shipping
Parasound zDAC.  This is the only piece without original box and I leave it on all the time because the push button for power does not always work as it should. $150.
If someone wants all three I will do some kind of deal.
Cheers.