I have two 20 inch and one 24 inch iMac G5/Intel boxes (yes, just the boxes, not the CPUs) that are great for shipping or transporting your iMac. If you threw yours out, this is the perfect replacement. One box is getting faded so this is not for display (if anyone here does that).
I am asking $30 shipped for each empty box. I figure it will cost about $10 to ship. Two of the boxes come in a box. One 20 incher will have to be wrapped with paper to protect it for shipping.
Send me a PM or post if interested.