Don't bother buying dorks. Everyone trying to sell them is scamming. The only way you're going to get combos from dorks if if you find a method yourself or if you're lucky enough to find someone selling their personal method.
Also, all this "handwritten HQ dorks" is bullshit and are likely generated in some way. If someone is truly stupid enough to handwrite their dorks then they should stop wasting time because generated give better results than handwritten in the end.