couple of things in the new/used scenario. New always has to have the taxes added and then there are the costs of the dealer prep etc. Some of the dealer prep can be discounted but most likely not. Used will not in most cases involve any taxes if not purchased from a dealer. We were told that you can add up to 15% to the price from the dealer when making a purchase! Also remember when bought new most license and taxes are based on the msrp at least here in az. we bought a 2012 winnebago with less than 4500 miles for at least 20K less than new and NO sales or VLT taxes from an individual. Last year the same unit off a lot was at 84K and we still got it cheaper than that so you have to make the determination based on where the purchase will occur. You can purchase out of state but your home state will collect the license fees when you register. There is a place in texas that has $100 fees and some small taxes for out of state purchases but you get caught when you get home. Knew a guy that bought a vehicle in Ky while at Ft Knox, paid no state taxes, got home and they got him for them.
forgot to add, you can purchase rv insurance from Good Sam to cover your investment. So if you get a used unit from a dealer or individual this would be a way to have some sense of being that you will not be out on a limb if something goes wrong with the unit. Even with buying the insurance its still cheaper than buying new (normally 1 year on appliance and whatever on the coach and drive train 3/36000?), and even from a dealer used (they normally dont warrantee anything either).