You could offer 20$ a point and all costs paid by seller and they could accept... BUT you will not get the honor of buying.. as Disney will excercise ROFR.
In the end if the deal is too sweet for Dis to pass up they will not pass it up. ESPE with SSR, BLT, and AKV as they are currently selling them and have excess quanties.. so why not more to sell at 20 - 30 - 50$ more than they paid for it. As well, if they have no say June UY for BC, they may want that. Or may let go Feb UY of a WL because they have enough.
I am sure, there is a secret some where on whether they will ROFR, but the lower the price and the more the seller pays the less chance you will have of passing ROFR. (IE the best overall packages.)
Use one of the magor resale places and talk to them about this. The reality is they will know what your bottom line out the door needs to be to pass, needs to be to probably pass, and even a # to possibly pass and what is way to low. If you pay say 5$ more per and ask MF fees (about 5$ a point) paid, your bottom line is still the same, .. and so is Disney's.
Find a resale realtor you feel confortable with and trust them.

If you are okay going through it more than once for a better deal, tell them this, they will asssit.
GOOOOOOOOD LUCK!