ibm discount

from The Free On-line Dictionary of Computing (8 July 2008)

IBM discount

   A price increase.  Outside IBM, this derives from the common
   perception that IBM products are generally overpriced (see
   {clone}); inside, it is said to spring from a belief that
   large numbers of IBM employees living in an area cause prices
   to rise.

   [{Jargon File}]

   (1995-02-07)