Well, these things are nice of course......but......I still have a feeling that I get a whole lot more from reconditioning/restoring a USED machine, getting it to a condition that is as good as possible/close to new.
It gives a lot of satisfaction to work on a machine and see it re-gain it's old glory step-by-step.
You'll never get that with a NIB......also I think you would tend to hardly touch it (keep it in the box) with a NIB, whereas you enjoy a restored machine by looking at it, playing it and showing off what you've accomplished to friends....
Just MHO