A car transporter carries 11 cars and can drive say 500 miles per day at a cost of $500 per day (including driver, fuel, and vehicle rental).
If the average delivery distance from factory to customer is 1500 miles, then transport cost works out to $136. Add to that the 'last mile delivery' which is probably going to involve a $20 per hour employee driving to the customers premises, doing a 2 hour training and handover process, and catching an uber home. Call that 4 hours, or $80 + $30 for the Uber.
Total delivery cost with an efficient delivery network could be $246.
Assume a 20% 'failure rate' (ie. where the customer rejects the car), and in those cases double the cost (returning the vehicle) and fold it into the amount the other customers have to pay, and you arrive at $369