As for pricing to build sites for others it's hard to say. I'm currently in the market in hiring a web designer / dev and at the same time I'm teaching myself to avoid paying high prices so this is what I look for and the price I would say you should ball park:
Site Done In:
HTML5, CSS3 & JQuery - dynamic, with the ability for the purchasee to upload content on their own using an FTP or admin page log-in. (me personally I prefer the whole site to be hard-coded using a Text-Editor (Coda, TextMate, BBEdit) I wouldn't pay more than $1,500.
In saying that it doesn't mean you can't get more, you just need to establish yourself in the marketplace and have a great portfolio with a wide variety of site creations.
It also wouldn't hurt to do a pro-bono with someone who can market you to thousands of people...like me,

What tools are you currently using?