I'm not from Nebraska, but I do not doubt the
DVC guide's statement. They have to be up to speed on the various state's laws.
There are several states that regulate timeshare sales quite closely. In a nutshell (and very generally), developers cannot sell or solicit sales for a specific timeshare to a state's residents unless/until the state regulatory agencies approve it. Some states are very slow to approve new offerings. Anyway, until Nebraska says OK, the DVC people cannot talk to you over the phone or send you any sales materials about any DVC property that hasn't been approved by Nebraska.
In the meantime, you can buy a resale contract, wait for Nebraska to approve SSR, or take a trip to Florida and buy there.
I'm not entirely sure, but you may be able to buy one of the other DVC properties directly from Disney over the phone. If OKW, BWV, VWL, HHI, VB or BCV interest you, call the guide back and specifically ask if Nebraska will allow themn to talk to you/sell you about those properties. (Nebraska may have already approved those properties. DVC is pushing SSR, but they will sell the others if they have the points "in stock" and the customer insists). FWIW, if I were interested on one of those, I'd very seriously consider a resale contract. You'd most likely save a few hundred dollars going that route.
Best wishes-