Well, I'm gonna chime in here just to have Ross tell me how I'm wrong or that it won't work.
I think we can sign Lamar. I want to. I agree with everyone here that he's a franchise QB; the best we've ever drafted - or the Browns lineage ever has too. Where I think we win is in offering a guaranteed contract like a Bobby Bonilla deal. We say, "Hey listen, Lamar, you're our guy. We hope we're your team. Let's do this: we're going to give you a guaranteed amount over the next 6 (7) years. It's not going to match the yearly of Mister Massage, but it will eclipse it over all. We wanna have the ability to keep a championship caliber team around you..." blah, blah, blah.
In the contract, as in baseball, after year 4 (5) there is arbitration. If he meets/exceeds performance criteria he can escalate the payday. The Ravens would have to remain vigilant in offering new deals to him to extend the life of the contract. But with a structure like that it might work.
What we can't have is his deal hamstringing the team overall. And if there is an injury and he can't be "Lamar," then there has to be a reasonable exit where he still gets paid and we aren't crippled by living up to it.
It could even be that we agree to yearly arbitration in years 1-5, but not 6-10 or vice versa. The agreement being that he remains in the top 5-8 als paid QB's in the league for the length of the contract. Be creative is all I'm saying.
And if he can't agree to any of that then send him to the Dolphins, Raiders, Skins, Texicans or whoever wants to pony up draft picks galore to get him and we'll go on without him.