You've already answered your own question. (Not surprising, considering you're someone with extensive research training!

)
The price is $10 per point for the same reason the newspaper is fifty cents and gasoline is $2 per gallon.
Buyer and seller are both happy with that price. If we refused to sell for anything less than $20 per point we could get it.
That is if enough renters were willing to pay it.
If renters refused to pay more than $5 per point they could get it.
That is, if enough of us were willing to rent them.
As someone mentioned, some people have sold them for $12 and over. Others have sold for $8 and under.
Maybe a better question is: how can we owners drive the price up? One way would be to band together and refuse to sell for less than $15. (Otherwise known as collusion.)
A more likely way is to raise the owners' cost per point, therefore driving up the value of the property. (Better for Disney, worse for us.)
A better way (for us) would be to have Disney stop offering so many discounts on their resort rooms, which drives down the value of a DVC room. (Of course, Disney must not be filling their rooms, or they wouldn't be offering the discounts, therefore this plan would hurt them.)
The best way (for Disney AND us) would be to drive up the value of the resort so that millions of people would be begging to get on property. How can we do this? A couple of ways:
1) Move all of Disney to an oceanfront location on the coast of Kauai. You could rent for $30/point. Guaranteed.
2) Pay off the city councils of Orlando and Kissimmee to shut down all of the timeshares in this massively overbuilt market.
So there you have it. Short of relocation or bribery, or collusion, we're probably stuck pretty close to $10 per point.
Sincerely,
Someone else with Extensive Research Training
