I think you are referring to an older post from molotov who in Jan 2012 bought a brand new 2010 F07 for $52k where the MSRP was $76k.
While brand new, his car was actually 2 years old at the time....
The same happened for me. 4 months ago (3/2012), I bought a DEMO with 6,000 miles on it. 2010 550i GT. I am the first registered owner. The car has just about every available option.
MSRP was $92k, I paid $51k.
Again, the car at this point is several years old, but has all the available options as a 2012.... but without the bang-you-in-your-head (with the white meat showing) price. LOL!