The "Body Texture" item is not tradeable, and you'd need a TSA to transfer it to another account if you needed it transferred.
I don't think any given TSA would be up for it, though. They have stuff to do, and don't usually give themselves up to be voluntary middle-men in a deal.
To answer your first question, you can, but you can't.
As for your second question: Ask
here to get appraisals from other users on the forums.