Exactly. These are the responses :
1. Someone really good, i.e. Guus - 'There's no way he'll come, you're in la la land'
2. Someone unproven, i.e. someone doing good in the lower leages or someone from an OK foreign team - 'There's no way to know how he'll do in the Premier league'
3. Someone availabe, i.e. Clarke, possibly Mackay - 'He's rubbish', well duh... that's why he'd be available to a penny pinching Villa in the first place.