One of the questions that comes to mind is this. How
many spares is
too many?
Here at the MARCH Computer Museum, we consider selling things whenever
we have four or more of something. It's good to have a display system,
a backup, and a parts machine / backup to the backup. But once we have
a fourth, fifth, or fourteenth (as is currently the case with our model
'33 teletypes!), then we start parsing the collection. As such, at the
VCF East next month, we'll have a MARCH Overstock Sale.