The ultimate goal of the developer: sell the house in a short time and withdraw the funds as soon as possible. So it's no problem to sell the house to you. The technical term they operate is hype. The purpose is to keep your appetite, and then create a tense atmosphere for you to pay quickly.
If you really want to buy it, ask the sales manager to give him a few hundred dollars or a thousand dollars, and he will make proper arrangements for you. Anyone who lines up to shake the number but doesn't shake it is fake. Maybe you can get his highest privilege. But you have to find the right person.
One word: black!