To be clear, it is the price of DC points that threatens to increase on September 11. The current stated price is $12.12/point.
I recently received a solicitation from Marriott Resales to sell one of my Waiohai deeded weeks; the proposed listing price is consistent with the web page linked above. There is no mention of any price increases for resale weeks as of September 11 or any other date.
Buying and using a resale week at Waiohai (even one bought through Marriott Resales) would cost about half as much as buying enough DC points to reserve the same week. Which is why I agree with presley that the price of weeks is likely to hold up well.
Since the price of points are going up, I was curious if Marriott is listing the existing Legacy weeks higher now or not? They have to become good value even through the Marriott but the problem is that almost every week that is sold today, Marriott has the right to buy it back.
I believe that they are using a formula so they will not only put the better weeks in the trust as that would hurt legacy week owners to get the desired weeks in the season they own and, if they buy dirt cheap timeshare condos, they can sell them for the same price per point so make more money.
My concern is that, when the points keep going up in price, Marriott will lower the listing prices because new buyers are willing to pay a certain amount to go on a vacation and there is a limit that they will spend, IMO.