| A real, official MINI sunroof is going to cost loads, if you can even find someone to do it. It would presumably have the drains in it to keep the water out of the interior of the car when it leaks (and they all will at some point). It would also then be integrated with the car's electrics.
A cheap, small, "drop-in" unit won't cost nearly as much (I've known people who've had it done for a few hundred dollars, and others who've done it themselves, but not on MINIs), but then you have the worries of leaking, proper sealing, etc.
FWIW, I wouldn't bother trying to add one.
-Eric |