Normally in resales the dues for the current year pretty much follow the points. So if you are getting 200 of the 210 points, you'd be expected to pay the dues on those 200 points...if not the whole thing. That's not carved in stone, of course, because everything is negotiable in a resale. But normally, the person getting the points pays the dues.
So one negotiating strategy might be to counter with paying all the dues if the seller pays the closing costs. The seller countered with a lower price, so it looks like they're at least a little bit flexible, so that might be worth a shot if the contract is perfect for you.
It may be that this deal is just not meant to be, however. To pay $54, you're going to need a motivated seller...and this seller may not be in any more hurry to sell than you are to purchase. You have to find a deal that is a good deal for both parties. You might be better off making a desperate seller happy, and this seller might be better off with another buyer.