Mo Williams started under Mike Maser at Jax and was all-rookie. He started 10 games at guard this year for the Jags so, at a minimum, he'd be great to add depth at RT and RG.
He's awfully involved in the Jax community, however, both in business and charity. Of course, it's only 350 miles down I-95...
Given that he lost his starting tackle job last year and was moved to guard, his price ought to be reasonable. He ended up getting a bonus last year for having outperformed his contract which paid him only about $425,000 last year (something like that).
Phins should be able to get him for about $1.5m-$2.5m a year for a 2-3 yr deal.