I agree, take a moment. People that buy direct aren't idiots or making huge mistakes. Everyone has to judge their situation differently and buying direct makes some sense for some people's situation. With that all being said, early in my career, I actually worked for another timeshare as a sales person for about 3 months. In that short 3 months, I learned a lot about the industry. I had a ton of conversations with buyers about other timeshares they owned and I got a pretty good idea about how the resale industry worked. 5 or 6 years later, I started looking into
DVC and bought a resale, prior to them stripping the benefits.
The biggest thing I looked at before I purchased DVC was the value. That comes in two ways. The first is are you going to save money on your vacations and vacation in the type of room that will make you happy. The BWV's needed an upgrade 5 years ago and since they did that, we've been very happy with where we've stayed, how we've used our points, and with our overall experience. So, we've definitely saved money with how we've used our points vs if we had just stayed with cash at the same resort, or god forbid, stayed at a pop property (IMHO, value resorts are not an option for me).
The other value comes in something you own and how much would someone else be willing to pay for it. We purchased prior to the recession in the $80/point range. It dropped in price in 2008 significantly, but over the last 10 years, the resale price has raised by 50%. That's rare for a timeshare. If I sold it today, I'd have gotten the value of using it for 12+ years and I would have made money on the sale. Those are the two ways to look at timeshares. Will you use it and how much is it worth if you tried to sell it? DVC is not one of those timeshares where you're stuck and can't get rid of it.
If your Mom doesn't want to go resale, there's nothing wrong with that. If you use the points, eventually you'll get ahead. Buying direct just takes longer to get ahead. People that purchased direct in 1992 have seen the value of their purchase on the resale market go up past what they paid for it with direct buy. That may or may not happen at $180/point, but it could.
With all of that being said, your Mom just needs to be educated and comfortable with her purchase.