Well, that's where we got Adebayor, Sagna, Petit, Vieira etc etc. So it can work.
And I still think Koscielny will be a good buy. Squilacci was a risk, a bit like Silvestre....seeking only to plug a gap on the cheap...this is my only worry really. If he makes that kind of signing, i.e. "knock down price on the cheap but cos he's old makes him experienced" we're fucked.
But if rumour is true, we'll do a few of those rough diamonds, a few yongsters, and most importantly, a few experienced higher priced quality signings.