TUG is a great source of information. I've learned a lot from TUG about timeshares and Starwood's system in particular.
Unfortunately, however, TUG seems prone to silly conspiracy theories when it comes to Ebay. (If you don't believe me, just do a search on "Ebay" and read some of the threads.) I've been an Ebay user for more than 12 years and it seems pretty clear to me that nothing nefarious is going on with this auction.
The only thing that is unusual here is that the high bid got so high so early. Nowadays the most experienced and serious bidders enter their bids in the last few minutes, i.e "snipe". For example, the bidding history on the EOY auction I link below shows that the price would have tripled in the last 60 seconds.
As djyamyam points out, the high bid is well within the market range for a 2br ski week at this resort. This couldn't easily be discovered by searching completed auctions on Ebay since there haven't been any recent ones. However, much of this info is readily available here on TUG for those who don't regularly follow this resort like djyamyam and I do. (BTW, no recent listings may indicate some scarcity value.) There have also been several EOY listings including this one which indicates the 10k valuation is reasonable:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=250308864328
A look at the bid history for the EY listing makes it pretty clear what happened. This can be seen here:
http://offer.ebay.com/ws/eBayISAPI.dll?ViewBids&item=280285443307
Normally the high bid would only jump enough to outbid the second highest bid of 6500. However, the seller apparently had a 9999 reserve and the high bidder exceeded it. Ebay automatically increases the bid to the reserve level. I don't like this as a bidder, but that's how it works. It's one of the many reasons I normally don't bother to bid on reserve auctions.
Not only is the 9999 not a silly high bid, I would not be surprised to see the week sell for more than that. Last year I was outbid on a 2br ski week at SMV by another Tugger who paid in excess of 13k.
On another note, I don't agree with the characterization of this resort has having "high" maintenance. A 2br locks off into two units that rent and trade as true 1 bedrooms. $525 per year for a 1br may not be cheap, but it's hardly "high" for a name brand timeshare.