Is this haze inside of the lens in this photo of a camera

The upper lens will only affect what you see in the waist level viewfinder. The lower lens is the one that projects an image onto the film. Both of the photos in the question are focused at a point well above the top lens. As a consequence the details of the lower lens are blurry enough that you can't tell much of anything about it. This might be due to incompetence on the part of the lister, or it might be intentional to make it harder for potential buyers to see the actual condition of the lower lens.