Yes, lots of questions indeed! So geht es nicht, meine Herren!
You have a new account here and you are discussing high value transactions without escrow. Transactions must be escrowed which means a trusted escrow from this list:
https://bitcointalk.org/index.php?topic=855778.0must be involved and engaged to hold the bitcoins in suspense until the car is delivered and inspected to the satisfaction of the buyer. Not a single Satoshi is paid upfront.
A lot of scammers offer nonexistent products and services. Buyers are asked to pay upfront. If a buyer disagrees, the scammer insists on a deposit instead. Either way, it’s still a scam. The scammer’s goal is to gain or steal something, no matter how large or small the amount.
For this offer to work transparently, you must agree to use escrow or a trusted middle man to hold the bitcoins. This would mean having enough money to buy and ship the car upfront. A challenging task that is, I’m sure.