Hi Kbolin,
Every diamond has it's price... This can be a nice diamond (AGA class 2B) but you can find similar diamonds for much less.
Here is one I found by searching from the front page (>2000$ less!):
1.51 H VS2 74.3% 74% GIA mdtk no gd gd no 6.29*6.12*4.55 $6101