Blackberry

I just got this machine that was listed on CL for $40. I know absolutely nothing about Elna Sewing Machines but it came with a manual and my sister has the Elna SU so I figured between the two of them I could surely figure it out. I was wanting a machine made in Switzerland but the Berninas are always way out of my price range and this seemed reasonable to me. Does anyone know if $40 was a fair price for this machine. I had no accessories, just a manual and foot pedal. From what I can determine it takes a standard short shank foot but I am not at all sure about the bobbins. The three bobbins that came with the machine have a solid back and holes on the other side but I can't determine if it is a regular class 15 bobbin or not or maybe it is a class 66. Again I need some input from you Elna owners.