Present owners of contracts have a deeded interest that they can sell. Buying a small contract (e.g. 100 points) from a resale would likely be expensive, since the closing costs and transfer fee would add about $4 - $5 / point cost. Since Disney has the right of first refusal on all contracts, they might elect to buy the points at the negotiated price, rather than let a small contract go to someone who does not already have membership.
If you are willing to pay a high enough price, then I suspect that the deal would go through, although I would question the value to you of having only a small contact.