DVC ownership is cyclical. A lot of people buy when Disney is selling the resort on vacation in a "this is the best vacation EVER" high - then a certain number of those folks sell within a very few years - they burn out, they want to go other places, they couldn't really afford it. After that first sell off (which AKL hasn't hit yet and SSR is in the middle of), then the resort moves to a normal resale cycle - people sell because they want something different, because of life changes (divorce, kids leaving home, job changes, moving). SSR is a big resort, much bigger than the other resorts, even OKW is small compared to it - so its early sell off cycle has been proportionally bigger. Add in the great incentive - which made a lot of people "break even" on a family reunion trip even if they took a loss reselling points in two years, and there are a lot of resales. And lastly Salmoneous' point - they are priced a little high for the supply due to the initial cost - particularly for those that didn't get or use the points incentives.
There are a number of DISers however who have done or are contemplating what you are talking about. They bought SSR and discovered their heart is at a different resort - and they aren't happy with seven month availability - I don't know how many of them are going to AKL - seems like the Epcot resorts are popular. But their overall numbers aren't huge.