Sometimes you can exploit Nikon price increases, if you know ahead of time that the price will be going up.
In early 2009, I read that Nikon USA prices will be going up March 1st, 2009. So, I bought a brand new Nikon 24-70 AFS lens at about $1490 or so.
A year later, when I had had my fill of the decent quality, but 'too large to carry around' 24-70, I sold it for about $1400.