The guy was happy after the test drive (by me) and paid the deposit. He will be the registered keeper, so no problem. As soon as the money is in my bank account, he can drive it away tomorrow. My zed will become weekend car soon.
Just think I can get more from my zed if I can wait bit longer, but I have no space to keep 3 cars on the drive (and need money to pay the balance of the new car).