residential addresses in USA

I would like a listing of all the residential (non-business) addresses in the entire United States of America. The addresses will be used for a bulk mailing approach. I do not need the names associated with the addresses. Specifically I need; number, street name, city, state and 5 digit zip code for each address. For example, 2000 Main st. San Francisco CA 94105. The listing needs to be at least 90% complete. The listing may include business addresses but I do not need them. I prefer to purchase from someone who already has the data instead of someone who needs to find and create it. I prefer the listing was in Microsoft Excel 2007 format (multiple files ok). Let me know approximately how complete and accurate your list is and how much you would charge. Also let me know of any other information you feel is relevant.