Elements forum is only for the projects, that's why your question is moved to here. What I mentioned was that you can open your project thread under the "Elements" forum.
Let me try to answer your questions.
1. Yes, designers work with existing websites.
2. Yes, for a graphics project as you mentioned, you will post your project under "Elements"
3. Please check here: http://www.designoutpost.com/pricelist.htm
I think a moderator will be helping out for these questions soon. I'll let them know.