We bought ours TT used because we did not want to go into debt. It took about two years of saving and looking to decide exactly what we wanted.
There are very few items that depreciate as much as a TT for no more use than they get. We found a mint condition three year old rig with the floor plan we wanted, for 25% less than a similar "show special" unit on sale at the RV show.
It is not that we got such a good deal; it is the fact that TTs simply do not hold their value very long, so the previous owner took the hit.
Unless you are an avid camper of full timer, I do not see how to justify going into debt on something that depreciates so rapidly.