From what my DH and I have observed in regards to OKW resale bids that are passed or ROFR'd the big difference in price per point is that the really large contracts (500 points) are cheaper priced, often in the $50's. The smaller contracts of 25 to 50 or even 75 points are higher priced, usually in the $70's. Also the contracts that have the extended contract sell at a higher rate per point in the $70's for contracts of 200 points and in the $80's for smaller contracts of 25 - 70 points.
As far as to which contracts Disney will ROFR, we think that Disney is just like the rest of us, always looking for the bargain. The contracts that give the best price over all is one that will be ROFR'd. What I mean by that is the total cost is considered: closing costs, if the buyer pays, it's a good deal; MF's - if the buyer pays it's a good deal, if the buyer pays for both last years MF's and this years MF's it's a better deal. If the contract offers all of last years points and all of this years and next years. These fully loaded contracts are attractive to Disney as well as it is to us. The final wild card that makes it really unpredictable to determine if Disney will ROFR is demand. If Disney has a customer that wants to buy direct on a closed property and if Disney doesn't have the points they will ROFR to get them. I also believe that Disney sometimes keeps an inventory of points with various use years. So that could be another factor why Disney ROFR's. Also if resale price per point is too low on contracts that are currently being sold by Disney like BLT and AKV, then they'll probably be ROFR'd. Once again Disney could make a great deal of money by buying low and selling high.
As a previous poster stated, who really knows why and when Disney will ROFR. So when you decide to buy resale, you bid the amount you are willing to spend and just hope Disney will waive ROFR.