Did anyone happen to think the change in one car per day to one per 24 hours might have really caused the guy not to be able to send the car. I know it would be hard to sit and wait it our 24 hours in the OP's shoes but the guy could still be trying to trade in good faith.
If he does not send in 24 then shame on him!
If he does not send in 24 then shame on him!