My derm recently gave me some samples of a new line he's got in his office. It's called BelleDerm and it's a pharm grade skin care line that you have to get from a doctor.

Cost: AHA Cleanser - $26 per bottle
Moisturizer - $70 per bottle
Vitamin C Serum - ???
(He gave me the samples to try, but I did ask him what the cost was in case I did end up liking them. Here's what I can remember!)

Effectiveness: AHA Cleanser - Loved it. Really felt nice on my skin. Seemed to improve the texture and make my skin smoother.
Moisturizer - Not so great. It is supposed to sink in quickly and it did that. However, I felt that it didnt moisturize very well. Keep in mind that he gave me the one for oily skin, so I'm sure what they recommend for dry skin might do a better job. For $70 bucks I wouldnt buy it.
Vitamin C Serum - I used it for week or so and then started on my stronger dose of Retin -A (1.0), so I decided to hold off on it for a while. Didn't want to be too harsh on my skin. I'm not sure that I could really tell much difference, but again I didnt use it for very long.

Hope this helps someone!
Roxxy