I've been keeping my eyes open on this and thought I bought on sale earlier this week (52% off) - now I see it's on sale today for even more off (62%). This is frustrating. I wish that amazon.com would offer a price guarantee or refund the difference in a certain number of days.
Remember Amazon's prices are not written in stone. They occasionally have Blow outs on tv series. They just shipped me all of Superman (George Reeves) for 60 bucks (it retails for 160). When you see a bargain, if you have the available funds, GO FOR IT!