Here's are key differences:
1) Amazon's offering scales. There's no way I'd ever be paying $90/mo in storage costs without good reason. If I just send in a few things, it'll probably be a dollar or two.
2) Amazon has an inventory control system. You can request certain quantities of items be sent back to you at any point, for cheap.
3) Amazon allows you to use their marketplace as a way to get rid of the stuff, so your average storage costs decrease over time and end up being much less as long as your stuff sells.
2) Amazon has an inventory control system. You can request certain quantities of items be sent back to you at any point, for cheap.
3) Amazon allows you to use their marketplace as a way to get rid of the stuff, so your average storage costs decrease over time and end up being much less as long as your stuff sells.