Ethical to sell 1952 Mantle PSA 8 uncracked case

[almostdone]

Something like this actually happened to me few years ago and none of this even dawned on me. I had purchased a card and when it was shipped to me the seller put it in a PSA case with no flip in it to protect it from damage in shipping. It wasn't frosted. It just looked like two new halves that hadn't been used. He had a rubber band around it to keep it together. The tiny pins in the edge of the case that face the corresponding holes to line it up before sealing were still intact. If put together and squeezed slightly it actually stayed together.
I didn't think much about it except it was a good way to protect a card in transit. Since I had no real use for it I discarded it with the rest of the packaging.
I guess this sort of thing can happen occasionally. Scary to think what someone could do if a box of these plastic sides came out in the market. They have to be manufactured somewhere and I would bet it's not in house at PSA.
Kind of gives a new spin to the phrase "Buy the card, not the holder".

Drew