When buying a car, someone quoted a much lower price than the 4S shop and said that the car could be picked up in the 4S shop. I don't know if it's feasible. Please ask someone for advice. ...

It should be the secondary seller of the local 4s shop. They can get on the bus from the 4s shop and resell it themselves to earn the difference. Generally, secondary sellers can't issue invoices for car sales. If you want to drive a car in a 4s shop, you'd better be careful, because there is another situation where the car is cheap, damaged or in stock. When you pick up the car, you should carefully check the condition of the car, whether there are any traces of maintenance, the date of manufacture, and ask him for the car. Some 4s shops mortgage their car licenses to banks for loans, and then return the money to customers after the car is sold. Generally, when you pick up the car, you won't get it right away. It's nothing to wait for a few days, as long as you don't delay getting a car license.