Audi a7 Nct and tax( the price of the car12500€)

the car is very beautiful, very good, at the same time it is very well maintained, it still has Nct until October and tax until May, but tax is low tax all year, it is 280, I want to sell the car because I want to buy a car with a smaller engine, the car it has no defects apart from the oil sensor which costs 90€ but I went to the mechanic the former owner and he changed the oil and filters... I also have a report made on the internet which says that the car has never had an accident etc.. just I want serious people, I don't want to waste my time for nothing, the car is perfect any question you have you can tell me