I would buy it. The one on the lot is a sure thing. This truck is one of the hottest vehicles on the road today and Ford is having a hard time filling the orders. There will be someone willing to buy your truck with little loss to you. Your Cadillac will probably drop a whole lot more in value...
No reason for salesman to lie. I am sure he was given that info from Ford. Let’s not forget it is all about allocation , some might be sooner others longer. Percent of Hybrid vs 2.0 fry wheel or AWD and trim levels. 143 is going to be avg not actual.