Re: Buying a new camper
New has 2 advantages: 1) nobody has made undocumented modifications or misused it. 2) full warranty.
and 2 disadvantages: 1) you get to eat the first year depreciation. 2) you have to deal with any factory defects.
Used can be a better value (less depreciation) and hopefully (but not always) has the factory defects taken care of.
New should be available for at least 25% off the MSRP. Used should be available for 'Low Retail' (from a dealer, less from a private party). In order to qualify for any 'retail' price, the used RV must be 'ready to sell'.
A third option, if you can swing it, is to get a model from 'last year' which has not been sold. Since this has been sitting around on the lot for a year, the dealer should be willing to dicker more. Insist on paying the used (not new) price for that model and year, since that is what it will be worth the instant you buy it, yet you get the full warrenty and no former owner problems to deal with.
Unless the 2004 is overpriced, or the 2007 is massively discounted, it would seem to indicate that the 2004 is considered to be a 'better' unit than the 2007, since its used price is so close to the other one's new price.