Nothing is wrong with your H9a. The first pump is about 15 lbs and the 8th pump is about 38lbs. It is designed this way. But it get over 400FPS (Feet Per Second) and that is fast for a pistol. Everyone says it is hard to pump.
This pistol is also known as the HB17 or H17. In order to set a value I need to know the condition of the pistol. Is it in Poor, Fair, Good, Very Good or Excellent condition?