competition car won can i sell plus vat?

enquirer

This is a random question,,if one wins a car in a competition say £50k including vat,but is offered alt cash value ex vat and only 80% of that value,wouldnt one be better off taking the car and selling it privately,and if he did can he sell it for £50k?whats the best way to maximise the cash value is the bottom line,if one needs the money more than the car.Thanks guys