Just that! I'm on the hunt for a new foundation (have awful problems getting one pale and neutral) as B Brown has discontinued mine.
I have used NARS in the past but made a mistake buying Gobi (too yellow.)
I bought it in a J Lewis store where the lighting was awful and the assts didn't give samples. I want to try it again and have narrowed it down to 2 possible shades.
I want to try a nearby Space NK store (well, it's an hour away!) and wonder if they would let me try a couple of shades at home.
Estee L & Clinique etc give a small amount to try for 10 days.