No prices yet but here is some numbers to play around with:
http://cars.uk.msn.com/News/car_news_article.aspx?cp-documentid=7638280
Caterham RS ‘Levante’
The price for the stripped down, supercharged psycho Seven will be in excess of £115,000. Only eight will be made
http://cars.uk.msn.com/Reviews/article.aspx?cp-documentid=4984347
Caterham R400 Superlight
£25,995
Surcharge: £89,005 or $174,000
Atom 3
£30,000
Also article comparing the R400 and Atom 3
http://cars.uk.msn.com/News/twin_tests.aspx?cp-documentid=7378501