Amazon has the Firefly Clue Game for just $19.24 (Reg $39.99) and Prime Shipping. It comes with 6 collectible pieces, 9 custom weapons and a custom designed game board.
If you are not already a Prime Member you can join with a 30-day free trial of Prime, as a student with Prime Student, or as part of Amazon Family.
Please note that Amazon prices are subject to change at any time and may have increased or decreased since this offer was posted.