Wait til they've gone past the "ale and fanny period" though before judging a good young player. If his head isn't turned by that period and once they're past the 18 year old mark and they're still decent then you have a prospect.
I've just been quoted 2/1 that he plays for England. So it's more likely that he'll play International football than for us to stop up this season. Apparently.
If he is sold it better be for significantly more than £1million. He is going to be a top class player in the not too distant future.