New member and new to travel trailers. Need advice

Be wary of special show prices. Last summer we thought about trading in on a new rig. the salesman says they have a new model for the show in two weeks. When we went to the show we found the one we were going to buy at the dealer was several thousand more than at the lot. This was the special show price. We asked why and were told they had to pay for site rental people to move the rigs and extra insurance.