according to Nikon Rumors the D600 is coming in at 2,700 about double the predicted price.... weather that is true or not we'll see.
They also said:QuoteThe US prices of Nikon gear are usually lower, but at that point I think we can forget about a sub-$2,000 full frame Nikon camera. The D800 costs around ¥298,000 in Japan and $3000 in the US. With this ratio, I expect the D600 US price to be around $2,100.
Read more on NikonRumors.com: http://nikonrumors.com/2012/09/12/nikon-d600-price-in-japan-%c2%a5215000-around-2700.aspx
If the $2000-2200 price is real then you can expect the 6D to be priced at the $2500 mentioned above.
Do you think that price will included a lens?