Would anyone actually be willing to pay $10m+ for 5yrs+ and 4 firsts? Like I'm not asking rhetorically, but is this even in the realm of possibility?
If you're willing to expend that much, you're probably considering many options at least.
I seriously doubt he's getting offersheets, the team looking to get him would be way better off doing a trade with us rather than handing out an offersheet with enough value to get him to sign it