Forty dollars for a Yahtzee game that isn't gold-plated? Well, yes, if you're a Firefly fan, because the dice cup is a 9 inch long version of the Serenity! Behold the Serenity Yahtzee:
As for Firefly Clue, here's the Amazon description:
River has been betrayed to the Alliance!
Now with CLUE: Firefly Edition, help the Serenity crew to discover who is working with the Alliance, what they used to betray River and where on Serenity the kidnapping took place. Was it Inara with the Med Kit in the Engine Room? Or Mal with the Leather Necklace in the passenger dorm? Solve the mystery and save River!
Also, apparently as a result of this post last year: Where the hell are my goddamned adult Underoos? (NSFW - language), Hot Topic has started selling a limited line of Underoo sets for adults (Amazon has a decent Wonder Woman set, but nothing else):
Bonus: this Underoos commercial from 1980: