Modern Nissan of Lake Norman

I called on a truck for my father, was told I should have no problem getting 1g off the price. Went in to have multiple managers tell me they were already taking a loss on this vehicle and couldn't come down a penny. One actually had the audacity to say he could get more money then what he had it posted for, if he sold it to carmax. As rude as they were the truck was worth purchasing. My father called to place a downpayment and they assured him it was unnecessary and they would hold the vehicle for him. Two days later I received a call from them saying they sold the truck. What kind of business does that to cash paying customers?