Nothing wrong with it, as long as they give you the full warranty package, your getting a new trailer it's just a year older an your saving money. You want to buy and the dealer really, really, really wants to sell his old stock so it's sort of a buyer market in your favor
Most if not all appliance warranty's start from the time you buy the unit and last for at least one year ....
Ask for different tires, "G" rated Goodyear or Sailun unless the unit already has it on...
Lastly do a very good PDI before you sign anything, ours took 4 hours, we opened shut, turned everything, we had them run water in all the sinks and shower while we looked under the sinks, and under belly of the trailer for leaks.
Happy camping and safe travels