This is the original Moon Whistling by on a Cloud. It's creation can be followed from start to finish in the DVD: Therapy.
Its size is about 2 feet tall, 2 feet wide, and it weighs 65 pounds. But for its size, considering it is stone, it is light. Don't drop it, as it is also fragile.
Yes, very expensive.
Remember: No Reasonable Price refused.
Cheers,