this "mike" fella seems to be real bad news.
only way he would stop is when an angry victim gets a hold of him. 
I've just seen this so sorry for the late reply.
I've seriously contemplated this. I have his full address as well as landline telephone numbers and I'm actually due to go up to the North East. I know a few lads up there who used to frequent the gym I train at so it's not an issue to go to house either alone or with a few friends for the money but I thought dead against it due to the fact he's simply not worth it.
I've done many a bad thing in my life so turning up at his house and beating a couple of hundred quid out of him wouldnt be the worst thing I've ever done.
On a more positive note, as soon as you Google his email addresses - information about this incident comes up within the first few results. That's all I need/want right now. For others not to fall into the same 'give him the benefit of the doubt' trap and for him to find it difficult to sell anything or get any information/help about his car.
