If he's not fitting a new clutch then it should obviously be cheaper, so I'd be looking at nearer the £200-£250 range. Most garages are around the £50 an hour range.
£150 for fitting a clutch (if that included parts) is ridiculously cheap, I wouldn't trust the quality of clutch. £650 for fitting a clutch (Not including the parts) is unbelievably expensive, I wouldn't trust myself for making money spending decisions again in the future!
