old motors could last 5 to 10yrs no maintenance, also subject to users operations. but all the current manufactures arereally meant fo 2 to 5years also subject to use. once you get it working take the risk and buy so long as its a good bargain. have seen one old motor on use now for 20years , have also seen a new type go within 20 months of operation.
you can also tell me how to connect a 24volts dish motor to the current digital receivers cause of voltage difference, am told of the control box which i havent set my eyes on.