I have had both experiences from ebay buys. My little white Featherweight was not padded inside of her case and she slid and broke the side of the case. (Thankfully she is fully intact). I am considering rehabbing the case.
My 99K with bentwood case was packed very, very well. I had contacted the seller and asked that he/she bubblewrap the machine inside the case so the machine would not bang around and splinter the case. They wrapped it so well it took me almost a hour to get it out of the box and then out of the case! Kuddos to my seller.