New the machine head only is a t least $2500.00 so no $900.00 is not a bad price. They may have cannibalized it for parts which I never do. It is great that you can get the parts. I have a Juki 1508. Had it for over 20 years good machine. it replaced the LU-563. Get all the books on it if it did not come with it. part list, operations manual, engineering manual. You will need them.
glenn