You need to look at the total bottom line. In some states you only pay sales tax on the sales price of the new vehicle MINUS your trade in value, which can be a significant savings.
I bought one coach because the previous owner did not like the trade-in value given by Lazy Days. SIX MONTHS later, after paying storage and insurance on TWO rigs, they finally sold it to me for $9,000 less than they owed on the loan. They had to pay the additional $9000 to the bank. Besides paying more in taxes, storage, and insurance, they were stuck down here trying to get rid of the second coach.
Don't make a decision based on saving a few bucks that could cost you thousands in the long run.