It’s a long thread and I haven’t read all of it, so this may have been said. I’m no longer in the car business, but I did at one time work in F&I for a dealer. There is typically a conditional delivery document that is signed, which protects the dealer from mistakes and the risk of financing falling through. There is also an error and omissions doc for minor typographical errors. The signed documentation protects the dealer and not so much the consumer, so it may be hard to win with a lawyer. At this point the dealer should unwind the deal and refund the $5K. Sounds like they have already given the car back.