South Korea's FMS request is now online for a requested 60 aircraft. The full package is worth $10.8b or around $180m per aircraft (whole package divided by numbers of aircraft only.)
http://www.dsca.mil/pressreleases/36-b/2013/Korea_13-10.pdf
Seems like the $180m - $200m package costs are fairly steady at present. With the exception of Japan (which I suspect includes substantial domestic manufacturing and hence the higher per aircraft / package price tag) the costs are more than reasonable compared to other aircraft types.
just to be perfectly clear, when you mention these prices, the equivalent prices for other aircraft would include sensor suites as well am I right? Like in the Super Hornet comparison. Also, by your calculations, this price includes weapons and some sort of maintenance (I suppose) that is included in the overall price am I right? If so, 180 million per airframe is not a lot more than other airframes and, considering bang for the buck, might even be a contender for the F-16... Pretty impressive considering all the cost overruns.