It is true that resales of DVC contracts can fall into various problems, where one side or the other changes their mind or fails to perform. But this is the way with many types of sales, including real estate sales such as a house or commercial building. Usually, things work out, but if they don't then keep trying. Sometimes you may need to adjust your asking price or accept an offer that isn't quite as good as what you wanted. That is just the market correcting itself, and keeping prices in line with demand.
But the point is, the DVC Resales market is vast, and vigorous. If you list your points at a competitive price, there is a very good chance that they will sell, and, depending on how competitive, that they will sell relatively quickly. This is wonderful, and it is FAR different than almost every other timeshare resales market out there. I don't know of a single other timeshare resales market where timeshare contracts hold even a fraction of their value, compared to what DVC holds. And NOBODY goes out to buy them, except very rarely. I have had timeshare brokers, for other timeshares, come to me more than once and offered to GIVE ME various timeshare contracts, if I would just take over the last few years of payments, or just take over the property and pay the backlog of unpaid membership fees.
Be happy that it is DVC that you own and that you are trying to sell. Keep up on current prices and demand, and hang in there. You WILL be able to sell it, and at a decent price.