I think when you ship the boxes via ups you should just assume that it will be dropped from 8 feet up onto a concrete floor. After this, another box weighing 100lbs will fall upon it. If you pack with this in mind you will be fine. Packaging from companies like audio research and pass labs are like this.
This is also why I just sell some items as 'local pickup only'. My 80lb subwoofer for example. I cannot figure out how to pack this thing without spending $100 on materials and putting it into a washing machine sized box. So, I just wait for a local buyer - not worth my time to be concerned with it.
I sympathize with the cost of shipping materials. I have put out $70 for packing materials on a heavy item. I now save any throw-away computer packaging from my company.
This is also why I just sell some items as 'local pickup only'. My 80lb subwoofer for example. I cannot figure out how to pack this thing without spending $100 on materials and putting it into a washing machine sized box. So, I just wait for a local buyer - not worth my time to be concerned with it.
I sympathize with the cost of shipping materials. I have put out $70 for packing materials on a heavy item. I now save any throw-away computer packaging from my company.