On first thought I would have to agree with Jeff. It is likely you will throw good money after bad. I wouldn't be purchasing a new controller for it, and I would also not be wasting money on any used controller because you have no idea if it will work or how long it will last. Note that in the workshop, we always advise people that bring in non functioning equipment, that the initial quote is only on stuff that is obvious and because the equipment is non functional, that once the machine is rectified per quote to get it functional, that more rectifications and cost may come to light at that point..... On second thought and to take a complete 180 on this....seriously you paid so little for the machine that even at your stated new price for the controller, its a bargain, so I honestly dont know why you wouldnt want to pay new price for it (the controller) especially if that is all that is required at this point to make the machine functional. Up to you, and eyes wide open. Sorry couldnt be more help.