Except that it isn't at all in bad shape. It's in great shape. There is almost no connection between secondary market prices and the prices the developers can obtain---and that goes back to the way timeshare is sold---not bought, but sold. Buyers are buying on impulse, they don't know the market, and human nature is such that even if they do some research during their rescission period, they don't really want to discover they've done something foolish.
There are numerous examples out there.
Wyndham is my favorite current example. The system is so large that there are always a non-trivial number of owners looking to sell. But, there aren't enough secondary market buyers, so you can barely give away something that cost low five figures just a few years ago---I bought my deed resale for approximately 1.5 cents on the dollar six years ago. But, Wyndham is still selling at a healthy clip.
They have a presentation that reports a VPG (Volume per Guest) north of $2,200 for 2011. That means for *every* couple that tours, they can expect $2,200 in sales revenue, on average. They also report average transaction value at $17,000. That means that they "convert" (close a sale with) approximately 1 out of every 8 couples who tour.
Think about what that means. One out of every eight tours pays $17,000 for a product that has a market value of $1 after the ink on the purchase agreement dries.
I love the Wyndham system. They've got some very nice resorts in a wide variety of locations. And, purchased resale, it's one of the great bargains in all of timesharing. I'm staying in a 2BR condo in Alexandria, VA for Easter week/Cherry Blossom, right next to the King Street Metro Station for about $165 a night, all-in. Even those who purchase from the developer are happy---as long as they are using it for vacations. The instant they try to sell, though...