The same reason as nobody looked at Darren Bent apart from Charlton.
I am not saying we should sign all players from lower leagues, but just coz they don't play for AC Milan - doesn't mean they are not a bad player !!.
McShane is a very good, solid right back - the type of player we need. Not many get past him, does't offer a lot going forward but if you have Gabby, Ashley, Barry,Petrov, Luke and prob. one or two others in front of you - you shouldn't have to !!
Can't particularly remember many clubs apart from us looking at a youngster from Brighton called Gareth Barry - didn't mean he was crap !!!
But the difference is that Koumas for instance is not a young player, like Barry was when he signed for us and so too when Bent signed for Charlton.
There is a reason why nobody in the Prem has tryed to sign the Koumas' of this world!