Shipped a motor to Canada last fall with UPS.
Here's a couple of things I did and didn't do correctly. First would be to build a very solid/sturdy box/crate for the motor with the motor secured solidly in the box. I also had the box metal banded in three different spots. (Did that.) The second thing I would do is put lots of packing, whatever around the motor so in the event the box gets dropped there will be some packing to help protect the motor and hopefully keep it from moving around in the box. (Didn't do the packing.) The motor I sent got dropped by UPS breaking the motor loose in the box, luckily there was only some minor damage, but still the same, they did manage to drop it. I had the box marked as heavy, this side up, fragile, and still it was dropped. The extra items I shipped with the motor were securely attached to the inside of the box, which helped keep those items from moving around during shipping. I would also insure it for the value you sold it for, that way if theres damage you/they have some recourse with UPS. (Did that.) Hope that this will help you out somewhat.