I am dark skinned and I have extremely dark circles that have some litle lines too. I was planning to buy MAC Select-Cover Up,but I am not sure becuase am scared to buy something that is $15 ad do not work. Now I am hearing about St.Yves Touche Ecalt(i think that is how it is spelled),but it looks very small and is $40.

I also have darkness on the sides of my nose.

I am really interestes about MAC cosmetics though. I already use Loreal True Match and it is satisfactory,but not enough to cover it. Covergirl Smoothers is too pale looking. No matter what I put on them you can still see darkness.
I am 16,I do not wanna look like a drag queen.

Actually, a concealer might not be your answer. Do you know someone who sells AVON? There is something called ANEW Alternative Intensive Eye Cream, it's usually about $25 and will last at least 6 months. It's specifically for the dark circles you are experiencing. You should try that before you pile on the makeup trying to conceal the problem. Fix it!
Good luck!!

mac is amazing. it is wellll worth the money! their concealors are very thick, yet they dont show that it is very thick when it goes onto your skin.