Doc hit all the main points. I just want to add that you can save quite a bit buying resale as long as you aren't in a hurry to book a reservation. The worst part is waiting for ROFR (right of first refusal). Also, if you are interested in one of the sold out resorts, ie..BCV, VWL, etc, you may have to wait for Disney to accumulate inventory for the resort you want. Just something else to ponder.