You're not getting a center of this caliber for an offer like that. Stastny is not getting younger, he will go for longer term on his last contract in the NHL. Expecting 6 years in between 6 to 7.5 million (Best center available after Tavares, could get extra money for that). He was really good with the Jets especially in the playoffs.
No chance he gets 6 years.
Alzner at 29 years old got 5 years
Shattenkirk at 28 got 4 years
Okposo at 28 got 7 years
Lucic at 28 got 7 years
Radulov at 31 got 6 years
Hanzal at 30 got 3 years
Statsny would be 39 at the end of his contract if he signs for 6 years. None of the ufas above come close to that.
Also, last summer Alzner was the only ufa to get over 4 years. So it seems gms have become wary of giving long-term contract to ufas
I expect Statsny to get 4 years, but I would offer him more money to make it 3 years.