If you had put a deposit on that unit, that constitutes an implied contract of your good faith to purchase the unit. If the dealer sold the unit to another person after you deposit was accepted the dealership was liable for fraud and you should have demanded compensation for your wasted time. Once I was visiting a car dealership looking at new trucks, I turned my trade-in key over to the dealership for an appraisal while I browsed the lot. Long story short, they sold my car while i was shopping. I didnt find out until i tried to leave. Selling a vehicle without legally owning it cost the dealership a brand new truck with all the bells and whistles for free in return for my signed release not to pursue legal action.
