Quote as high as you can (reasonable price that is...), coz, you'll never know when clients want to change that change this... some clients are very very picky. Even tho the site is simple, you need to take everything into consideration. Your time, your sleepless night, your stressful day thinking about when ideas gonna pop up. Even simple stuffs like image resizing, touching, cropping, etc. Those kind of things are easy to do if it's in a small amount. But if u need to resize like 20 pictures and then crop it, etc.
Take ALL into consideration.

Hehehe... yeah, true true.
But usually, I'll just ask them "what kind of design do you like?. Show me something (brochure, pamphlet, poster, etc.) that you like."

hehe, same same... but sometimes even coolhomepages.com isn't enuff. so, end up at deviantart...

p/s: We are a lil bit out of topic