I don't whether this is a mistake at Base or not, but that is the price they are showing inc delivery. It is over double for the next nearest price, which makes me wonder. If correct, it is a real bargain for 7 movies.
Features the films ALIEN, ALIENS, ALIEN 3, ALIEN RESURRECTION, PREDATOR, PREDATOR 2 , and ALIEN VS PREDATOR.
I notice that it does not mention ALIEN VS PREDATOR on their list of films, but if you check, it does on all other sites selling the same boxset.