When was the last time the Dolphins, or any other team for that matter, signed a star free agent "for cheap," unless said free agent was damaged goods? Because it's brought up so often you'd think it happens all the time. I seem to think it's quite the opposite. If anything, the Dolphins have frequently had to overpay for free agents.
Let's face it, 99.9% of NFL players are going to play for whomever offers them the most money (not that I blame them). I don't think many are meeting with their agents and saying," You know, I'm not as good a football player as I used to be. How about you find me a team willing to pay me according to my diminished talents? It's only fair."