My first suggestion is to ask your resale broker what they think. However, they have to represent both sides fairly and they may be reluctant to offer that kind of advice. If they will, they would be the best resource because they see a much wider range of ROFR activity than we see in the ROFR thread...plus they've been doing this for years.
Having said that, you know from the ROFR thread that $80 has both passed and been ROFR'd in the last couple of weeks. To me, that makes $80 a crap-shoot and anything less a little doubtful...although you never know.
You didn't tell us the use year, or whether you can use those banked 2004 points. If you can use them, or are willing to rent them, they have value and make a nice contract. It also matters where you stand on the 2005 point banking deadlines. If the double points for 2005 gives you more points than you can reasonably use, AND you don't want to rent points for whatever reason, then those points are less valuable to you.
If you CAN use or rent all those points, that's a sweet contract. YMMV, but I personally would price my offer $1-2 above where I perceive the ROFR line to be if I REALLY wanted that contract. It's only a couple hundred bucks over the life of your
DVC ownership, and you're getting a lot for the extra money. If that is the contract you want, I'd sure go for it.