With the confirmation of a third disc, I still say we hold off with regards to the coin. I think it'd be a neat item to have, but I think the budget could be better used for other items in the set. If it looks like we have some funds later to play with, then maybe we could revisit it, or if it's offered as an add on as has been suggested. I'm the kind of fan who will keep it safe in the packaging and rarely (if ever) remove it, but it is a very unique BGC item and certainly one that our Japanese counterparts do not have (and therefore, is special to us! They've always got neat stuff).
Also, since this thread's kinda turning into a general suggestion of other budgetary possibilities, lemme toss a few quick comments: The soundtracks to the series are beyond awesome, but they are available elsewhere and I think the budget could be allocated to other areas. I like the idea of the post cards (and I think Robert commented that they wouldn't be a huge budget hit), and I also think it'd be cool for a mini-poster or something, maybe like a concert poster, or an AD Police citation or an ad for the Silky Doll or something along those lines (provided that it wouldn't be a drastic on the budget). I know this stuff kinda falls into the same category as the coin, so really, it depends on how much it costs (for my vote, anyway). Since the chance of a re-dub is (sadly!) out the window, I think we would should prioritize 1: on disc content, 2: packaging and then 3: additional physical items.