Let it stay that way.
Giving stuff away is just plain communism, we can't allow that.
Seriously, there have to be rare things.
In case of FFA, it's perfectly fine balanced rare thing: acting identical to obir, giving you no special reward other than having it itself. A collector's item in a nutshell.
Put it up to joker store and you'll just break someone's theoretical stimulus to grind, and rather many one's feel of having collector's item. This way you'll ruin it for a few that enjoyed it and won't get much off many who'll buy it of a contact and forget about it, cus, as said, it is nothing special if it's not rare anymore.