I paid $1600 for this 55" in 2006; It was the last year Mitsubishi made a 3 gun Rear projection unit.
I had it calibrated in 2008 by Craig Rounds; I believe that is his name.
Anyway, Is it worth getting the unit that is a dying breed calibrated? It has a good picture but I probably have adjusted my eyes to it. I clean the surface of the lenses every 12 months.