Taquan Air has a coupon in the 2010 Toursaver book (
www.toursaver.com) for buy one/get one Misty Fjord flight free. Cost is normally $229/person and they are letting two fly for that price (cost of the toursaver coupon book is $99.50 plus shipping but as you can see, just one coupon can save you more than the cost of the book).
And there is a secondary market for used books on EBay.