The price is not relevant to the test results.
Many disagree with the method of testing - In particular Arai claim that the test requires shell strength in areas which , in their experience (and they must have a lot) , do not require it.
Some manufacturers construct their helmets to pass the test whereas Arai make what they feel provides the most protection.
It may be worth looking at the test procedure to make a decision on whether it offers a suitable guide in the real world.
There has been much disagreement over this test and its results.