IMO, you got a good deal. You are getting half of the current use year points (about half of the use year will be gone about the time you get into the system and can book), and a full complement for 2016.
Prices have gone up lately and it seems that loaded and stripped are selling for about the same ppp. Perhaps you didn't get a great deal, but IMO, you certainly got one that is fair to both buyer and seller.
Keep in mind that a few hundred up front isn't going to matter that much over the life of the contract. You'll be paying much more in dues over the life of the contract than you did for the initial buy-in.
Good luck with ROFR!