Preferred method of Blu ray shipping

[bevins2016]

Hi all, I am getting back in to selling stuff on ebay, primarily Blu-rays. There is a lot of money to be made buying store exclusives and reselling for a profit later (this is mainly to pay for my habit of buying movies I can't normally afford, not really looking to get rich). I am trying to maximize my profits by creating the cheapest shipping option but I also want every item received from me to be completely unaffected in transit, including slipcovers. So I have come to you my fellow Blu-ray enthusiasts, what is the cheapest/best way to ship Blu rays completely undamaged?

I need details on single Blu-rays, the thicker 3d sets, shipping bundles of two or three, and shipping 10 or more at once. (assume everything has a slipcover that you want to remain undamaged.

The more detail the better, and picture examples are welcome too.

Be kind, this is my first thread.