Jan- Wow, $40!
This is the 503-A. To my knowlesdge it is the step above the 500. I have all the attachments and then some including all the cams. I don't have the bench either. Would love to find one. My mom's finish isn't too bad so I will probably leave it. My mom, two DS', both grandmothers, and I all sewed on this machine. Many hours are on the machine.