I have to laugh at any "collectors" who tried to cash in on Japan books and sold them for a lower price of £60-70 hoping to pick it up £15 on Zavvi. Now they can't get them and will have to re-buy for more than they sold!
I know this may sound harsh but I am a collector for me, not for price of the steelbook. I didn't but Roger Rabbit because although the steelbook was nice, I didn't actually want the film itself. Despite knowing I could sell for more than I could buy.
Money isn't everything, I am just happy I still have the white Japan Batman steelbooks, granted open but I don't plan on selling so it doesn't matter.
I EVEN THROW AWAY THE SLIPS BECAUSE THEY DONT INTEREST ME =) .... my opinion.