It's a little more than a body kit as it has a wider rear axle and an engine upgrade to 400HP.
But I definitely agree with you that it is too much to pay for an "evolved" C2S unless you want to speculate - which would be a good idea especially if you can import one to the US.
BTW don't forget the GT3 RS as a successor to the 2.7RS, the GT3 is a little too fade