R53 Cooper S 2003 with a 2008 JCW kit, what power?

[Baked_bean]

Hi guys,
I am considering a MINI as per the above. I am a newbie with these cars but I understand the power outputs changed over the years, would the 2008 kit mean the pre facelift car would have 210bhp?

Also if I was looking at a good condition one of these cars with around 70-80k miles on a 53'plate what would it be worth?

Thanks in advance.