He's 28 going on 29 next month so he's probably around his peak as a central defender. A bit like us with Lenihan, someone will pick him up. The difficulty is that no Championship team is likely to offer him the same wage as he's on with us, however if they need a central defender then they'll look at the savings from not paying a transfer fee.
If we didn't have him and had a central defence unit of Fry, RVDB, Lenihan and Clarke, we wouldn't put much effort into signing him, even if he was free.