QuinStreet does not allow actual pricing recommendations in the forums, as that could be construed as price fixing. All I can suggest is to estimate roughly how much time you'd spend, multiply that by how much you feel your time is worth, then adjust it per your gut feel of how much you think you can get from them. (If the last is lower than the minimum you feel your time is worth, then move on to something else -- unless you want to do it at a "loss" for now in order to gain the experience and add to your portfolio.)
If they don't have a lot of cash to spend on it, maybe you can negotiate a contract that includes free and/or cheap takeout? 🙂
