I've never seen it before.
We're looking at a Mother 3 promotional item up for grabs. It appears to be some kind of promotional fan for DCMC. It's got the band's name on one side and a bunch of Mr.Saturns on the other. The bidding is at 400 yen right now which isn't too bad for this kind of item. If anyone is interested or picks it up, be sure to post!
edit: Turns out this was a fan made item after all. Sorry for the false alarm everyone.