One of the message boards forums will allow you to sell, buy or trade vacation weeks or registry collection points with other owners.  Think of it, if you need extra time, you normally pay full retail renting additional weeks from the Melrose.  If you have a week to rent, you will receive only 50% of the rental fee (that's if they get around to renting it).  This message board allow you  to cut out the middleman and buy and sell weeks among us at 75% of full retail. (Or whatever price you negotiate.)  Everyone wins!!!!  This gives you an additional  alternative to market your unused time.