Nope, sounds about right for a contract of 50 points or less. It's a whole lot cheaper than $130pp from DVC direct.
The reason small contracts cost more is that they are often what existing members are looking for- and existing members are vastly more likely to be aware of the resale market. I'm confident a meaningful majority of first time owners just buy on or soon after their tour and don't even spend the time to check out what they are purchasing via Internet research.
The guides may mention resale, but they do it in such a new-car-sales sort of way as to make it sound to a rookie that resale isn't a good choice.
After owning a few years, a lot of owners decide they need a few more points to add at their home resort, or maybe decide they want the eleven month advantage at a different property every other or every third year. Enter the small add-on contract.
And, years into ownership, a lot of those current owners have browsed the Internet enough to find sites like this one or others that make them understand why a resale purchase is a wise financial decision. Thus, creating a higher demand curve for the small contracts that come to aftermarket.