Reading in between the lines here: "wants to sell me his CPO 2008 Box S"
Sounds like he wants to keep that sweet ride in the family.
Alternatively, keep telling him how much you want the car but can't really afford it.
He could end up selling it to you for much less than its worth; heck, he might just give it you.
Don't be ashamed either. If anyone ever does something like that for you, it would be your father.