Are you referring to Drink coupons? These are prepaid coupons through Carnival. Most people saved unused coupons to use them on thier next cruise or turn them into credit against thier balance. Basically, its money already spent. I don't think people would just give them away unless its a bon voyage gift to friends and family.
Life is too short to let the ship of your dreams sail without you.
Carnival Destiny Feb. 2006
Carnival Fascination Feb. 2007
Royal Caribbean Grandeur of the Seas Feb. 2008 The DTW & MsBJ tour
Carnival Valor MsBJ and Dina Feb. 2009
Carnival Glory MsBJ and Dina Feb. 2010
Carnival Dream MsBJ and Dina Feb. 2011