I haven't tried to buy tickets today, but I was on the phone with DVC Member services late yesterday afternoon and they told me that not only were all ticket sales shut down, at the moment, but Annual Passes, which were for sale (at least to DVC Members) up until Friday, had been pulled too, and weren't available for purchase. She said it IS quite possible to contact an external Ticket Broker and get tickets, and some people are doing it.
AAA, Costco, Sam's Club, some online ticket sellers, some travel agencies, and similar places.