There are many good reasons to have your vehicle valeted regularly,not at least to prevent the onset of rust and corrosion. Why leave it for a special occasion when for a very reasonable cost you could be driving a vehicle that not only looks as if it has just had a face lift but be worth more when you decide to change it.
The type of vehicle you drive makes an important statement about the type of person you are. A clean, well looked after car, for example will attract favourable comment and will reflect well on its user. A dirty car will have completely the opposite effect.