Okay...I got some clarification this morning from the closing company. They said that prior to accepting a timeshare week from the seller, they verify with Hilton the accuracy of the information in the eBay ad. In this case, both my fellow TUGgers and the closing company are correct:
The 9600 points I am purchasing IS accurate. What is happening is that I am actually purchasing two ownerships that, combined, total 9600 HGVC points.
I asked whether this combined ownership would result in higher MF's than were advertised, and the closing company again confirmed that--based on their discussion with HGVC--the MF's were accurate at the time they accepted this item from the seller. Of course, those MF's were based on 2008 rates; the 2009 MF's will likely be higher.
Does this make sense to all of you HGVC experts? Any additional advice you can offer would be most appreciated! Thanks again for all your help.