You would be better off asking that in the single player forum I guess. And it also depends on what you mean by higher....
Storing with Atma and trading atma stashes is the way things are traded there.
As said, check single player forum and ask them for their "rules" etc. However, if you trade a rune away, and still keep a copy of it on your computer...Well, that's duping if you ask me. In that way, you could pretty much have an infinite amount of runes...
Head on over to the Single Player Forum and make an introduction thread, get to know everyone. You can post any questions you might have in said thread and go over the stickied rules thread while you're there. :wink3: