I am assuming you mean to rent. I have rented points before and now am a DVC owner.
I can tell you that the average going rate is about $10 pp. There are some that rent a little higher at $11-12; and a few that rent a little lower at $8-9--but the vast majority are around $10 pp. Sometimes if you rent in bulk or take all that the person is renting in one shot; they will give you a slight price break. I would say that $10 is the going rate and is a good price(and it might go up when the price per point the new owners pays goes up June 1.); anything less than $10 per point is a great rate.
It depends on when you are going too; occasionally someone will have points that are going to expire in just a few weeks, and I have seen those at $5-6 pp--but those are tough to rent to a non-dvcer because of the time needed to get your money then send the reservation to you. Plus, availability is tough.
It all depends on where you want to stay too. If you have your heart set on staying at Boardwalk Villas and want to save points by staying in a standard view; you must rent from someone who has Boardwalk points and you must rent so that the reservation is made at 11 months out. If not, you won't get it. Even preferred view rooms are pretty hard to get at Boardwalk at 7 months or less out.
Beach Club is new, so the demand will be high; and since it is not sold out yet, the inventory is low. Again, not likely to get in at the last minute.
Remember, the DVC owner typically has as much as $4.17 per point in the dues just for that year--each and every year; plus the initial minimum 5 digit investment (minimum buy in is now $11,250 at $75 per point). So, you won't see people giving them away--and $10 per point is no great profit for the owner either.
Trudy