To be technically correct, there is no market value outside of the Steelers offer. He is RFA; the Steelers are his only market. The Steelers set his current market when they offered. He can either take it, deny it and finish his RFA season and hit FA with a larger market next year, or holdout and hope his Market Value (as seen by the Steelers) goes up.
The thing is the Steelers are not likely to budge. So, he can sit at home and stew or get into camp and work towards his long term contract and/or UFA. I think he is making a poor choice, but it is his choice to make.
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