How much would my piano be worth?

Its a 1968 Upright Monington & Weston, Good condition except from a few bumps and marks on the key cover (Due to previous owner) and the Middle B and B# pin is loose so a good tuner is required to tune it!The stool would be included with the piano, Its a wodden frame with a soft green material as cushioned top, excellent condition (Forgot to take a pic

Chair Cushions Kitchen