How much is a jc Higgins bb pistol model 89-10 1925 worth?

Two companies made BB guns for Sears under the JC Higgins name. One was Daisy. All of their model numbers started with 799. The other was Crosman and all their model numbers started with 126. So I don't recognize the numbers you have posted (89-10 1925 ) Also if you want more information you need to list the current condition of the Pistol. Is it still working? is it in Poor, Fair, Good, Very good or Excellent condition. Without more information it is not possible to give you an estimate.