xbox 360 for spares and repairs only -

i have my old phat xbox 360 for spares and repairs only iam selling as not working as it has the rrod sometimes it works but most times it dosnt someone did have a go at fixing it for me but i dont think he knew what he was doing as it worked for a few days then went again this is just the xbox on its own no wires or hdd just the xbox its a hitachi drive thanks james 07772035499