Should I sell?
I have a 360 that's been on a stand for about uhh well longer than I want to admit. I put it in a big old thick plastic cover, oiled the engine down all over the block. I also have the heads off and in plastic bags and oiled as well. No problems here. If your turning the motor over and keeping the parts lubed esp those rubber parts, your golden in my book.
And what Furyus said.