While Petro is a rfa next season, he will get offered a mega contract by someone. Quality dmen are to hard to find via draft.
Same thing goes for shattenkirk.
I don't think he will get offered a mega contract because I don't think the Blues will let it go that far.
But if it does come to that, I think the Blues need to seriously consider letting him take that contract because if it's for crazy money, the Blues will have a truckload of 1st round picks coming back their way.
It also should be noted that Petro has regressed quite a bit this year...not that this is indicative of how his career will be, but still.
Now... I really do hope the Blues sign Petro (they will) and he is here for a long time as he is still very young and his best years are obviously ahead of him.
His downturn in play should result in a cheaper contract for the Blues...so we'll see.
My guess is the Blues get a contract done well before offer sheets are allowed.
I'm guessing, based on what the rest of the guys on the team make, that he resigns for no more than $5 million per...and frankly, based on his play this year, he should be at around $4 million or less...but he'll get more than that.