Allways worth having a years MOT on a car when you go to trade in, this way they know that its street legal and it has no hidden big problem, also makes it easier and quicker for them to turn around and sell it. just make sure that when you go to trade mention the fact that it sailed through the MOT and just before the final offer has been accepted by you request another 50 pounds to cover this costs, well worth it considering the profit garages make on buy and sell these days