In case you have not already found it, this post is used to track which resales are making it through ROFR and which are not:
http://www.disboards.com/showthread.php?t=720134
It will give you some idea what you have to pay to get past ROFR. The price target differs from one resort to the next with BCV being the most expensive. This is a very long thread so just go the the last page since the data table is reposted quite frequently with the latest info provided by those going through the resale process.
A couple of other things: smaller contracts, particularly those in the 50-75 point range, will cost more per point than larger contracts. The buyer can ask for (and get) more because of supply and demand -- many people want to get into
DVC with fewer than the minimum 150 points that Disney requires so those contracts go for a premium. Also, Disney has been agressively buying up small contracts, presumably to keep people from doing exactly that, so a buyer will need to pay a premium price just to get through ROFR on a very small contract. You are looking to purchase 100 points so you won't have to pay quite as much but again, anything smaller than 150 points is likely to be a little pricier per point just because there aren't that many small contracts available on the resale market.
Also look carefully at the details of each contract. Some are "loaded" with banked points from the previous Use Year, all current UY points and all of the next UY's points. Other contracts are "stripped": no banked or current points and some/all of the next UY's points have been used, too. Most contracts are somewhere in between. The price/point will vary based on how many points the buyer is getting.
So take a look at the data and you will get a sense of what price you will have to pay to pass ROFR. But when it comes to making an offer on a contract, don't try to cut it too close to try to get a great deal. You might be thrilled that you talked the buyer down by $2/point and then lose the contract to Disney in your quest to save $200. Yes you will get your deposit back and be out no money other than the Fed Ex fees you paid to overnight your paperwork, but you will waste about 6 weeks of your time, only to have to start all over again, looking for another 100-point contract.
Good luck!