As long as WDW can buy a unit back for less than retail from customer A and resell it at retail to customer B the system will work.
Only if B-A is larger than their marketing expenses. Rule of thumb is that those expenses are between 1/4-1/2 the total cost (not the *purchase price*, the cost to the developer.) It will be interesting to see what happens if DVC ever stops developing WDW resorts. I'm not sure that day will ever come, but it might.
If the market slows down to a point where ROFR is no longer worth it DVC will collapse to a point that makes Wyndham resale look like an outrageous price.
Since the beginning of the year, Disney effectively stopped ROFRing anything, except BCV---and even some of those are getting waived at surprisingly low prices. There is the odd exception here and there, but not much. They've also stopped holding the line on OKW developer pricing, and allowed it to drift downward compared to the shiny new resorts, even though they can "extend" the contracts to 2054 for free when they ROFR something. It's not clear whether these are just consequences of the slow market overall, or if the DVC resale market has finally grown large enough to meet the baseline latent demand. Probably a mixture of both---as the economy recovers and fewer people find themselves having to sell, prices should recover on the DVC resale front.
But, Wyndham deeds are basically being given away. I don't foresee DVC ever getting to that point---even in the final year, I'm guessing there will be a significant spread between Dues and market rental rates. As long as that spread exists, a DVC contract has some residual value. Effectively, the DVC owners get to ride Mickey's formidable marketing coat-tails.
Then resellers will have to go from stressing low price to stressing that at least you actually own your time, not renting it for X amount of years.
I'm not sure what your point is here---no one here is a "reseller", as far as I can tell. In fact, most of the independent brokers I know no longer handle Wyndham, because there is just no money in it. I'm also not really sure that "owning" your time is really a selling point. No one vacations forever, and there is no reason to think my heirs will want to vacation the same way that I do. I think RTUs have a real place, personally.
I've long said that if your only interest is *Orlando*, then you'd be much better off renting from full-freight VIP owners who will pass their 60-day discount along to you. There is just so much inventory at Bonnet that you can find discount inventory for all but the most in-demand time.
However, if you have broader vacation interests in places where Wyndham has resorts, Wyndham resale is a pretty darn good value. But, you have to be committed to the idea of taking regular family vacations in condo-style lodging. That commitment isn't right for everyone, but we've been very happy with our usage of the system over the past four years. Lots of comfortable resorts in family-friendly locations, and at resale prices the effective cost is well under what regular hotel rooms cost in the same locations.