Thanks for all the advice. I'm going to alert my credit card company, and keep an eye on the reservation to see what happens to it. We can't dispute it as of now, since it is still valid. We weren't going to get a dining plan or use the Magical Express so no problems there.
I'm willing to give the guy the benefit of the doubt, since as of now I do have a valid reservation, which is what we purchased. He had been very helpful with information and communication for our purchase. Maybe something happened to him since he was highly-rated up until very recently?
Aside from not knowing if the reservation will be valid when we arrive, my one big problem is that this wasn't sold as "buying" or "renting" points, but as a week's stay at the resort booked through a
travel agent. It specified in the listing that "A reservation will be booked in your name, (as well as those in your party), your address and phone number." It also stated that "By listing this auction I verify that I am the actual travel agent or travel provider and not a third party affiliate." The only thing it says is "A Disney Vacation Club Resort", which doesn't mean much to someone that isn't a
DVC member and has no idea how the program works.
I've purchased timeshare weeks many times before, and never had issues with getting information from the resort directly. The owner was never involved in the transaction after the initial purchase and everything was in my name. I always follow up with the resort directly to confirm details. So not being able to get any information is the most frustrating part so far!