EVERYthing in a resale is subject to negotiation.
However, you need to remember that the most important number in a resale is the number needed to clear ROFR -- NOT the lowest price the seller will take. If you don't pass ROFR, nothing else about the deal matters, because you didn't get the contract.
I think it's also helpful to keep the right perspective on the per-point price. You are buying a long-term asset -- something you're going to be using for many years. It's borderline stupid to find a contract that perfectly meets your family's needs...and then lose it over $1-2 per point.
And yet, we see that happen often here. People lose great contracts for $200. In makes no sense, but they seem to get so caught up in the game of "the deal" that they forget the object of the exercise completely.