I'm a DVC member who traded into a two bedroom in a preferred location at the Marriott Ford's Colony Manor in Williamsburg during high season last year.
That trade cost me
270 DVC points.
The same type of villa (a 2BR Preferred/BW view) at my home DVC resort (the Boardwalk) during the exact same time period as my stay in Williamsburg would have cost me
314 DVC points.
Translation: my DVC "buying power" (the higher value of the DVC accomodation as opposed to the Marriott one) got me a bargain at Williamsburg. Or put another way,
the demand from Marriott members to get into our properties is greater than the demand from us to get into theirs, with DVC management leveraging that dynamic to our benefit.