He's come onto a game in recent weeks has yer black McCulloch.
At any other time, if you knew you could re-invest the money in players, I reckon you'd take a bid of £1m - he's 25, though, and a midfielder's prime is about 25 - 29 so he's just getting to the best bit of his career and that, in theory, should push the price up.
The money might not go back into the squad and you might be better off with the Devil you know
For what it's worth, when he's on his game, I think he gives you an effort aligned with composure you won't get from many other central midfielders. When he's gash, he can barely find a Rangers player with a pass.
Looking in, if you're not going to re-invest in another midfielder, I'd be happy to see him go - he's a player, like Broadfoot, that gets a hard time but I reckon he's better than he gets credit for.