My friend Roger put together a nice article outlining a few key points that could help anyone trying to sell a website have a more productive relationship with a potential buyer. He's been the point-man for many website/company acquisitions for about 4 years and I was even a technical consult during the due-diligence phase of quite a few of these.
"No company will sign on to buy a site without first looking "under the hood". Think about the acquisition process like a used car purchase. The buyer will want to first test drive the car (data collection), then take it to a mechanic to get it thoroughly checked out (due diligence) to make sure everything is in working order. Lastly, they would want to know that you own the car and have both title and registration to the vehicle (legal)."