I have two machines that are currently not working. AT Pro with Nel coil (also have the original coil), I think the control box is knackered. XTerra 705 keeps beeping, not sure what's wrong. Does anyone want to take either of them on? Open to offers. Alternatively, can anyone fix them for me? Or does anyone have one of either that they'd sell me cheap so I can combine the bits and make one good detector out of two? Cheers!