What do you Charge for site Design? What should I charge?

I’ve never charged anyone to build a site before…but they’re asking me how much, I started the site and really have no idea what is reasonable to ask for.

Suggestions? Do you charge per hour spent? per page/image created? Here’s the site, take a look and make some suggestions, if something looks of or out of place, its ok, It will be fixed I’m just getting the content in for now.

http://homepage.mac.com/issues4/metro_la/index.htm