Very Old looking Western Flyer 3 wheel Tricycle. Any ideas how to research its value? ?

Very old Western Flyer Tricycle. We now its at least 30 years of age but looks older. Looks like its all original. Has solid rubber tires. Has cone shaped grips on the handle bars with groves in them for gripping. All the bearing in the wheels turn excellent with no grinding sound. It has been used and looks like too. Tires and petal are worn but they are still on.