I just received the same email response as Adrien and have reported it to Craigslist. I suggest you do the same to protect someone that may be too desparate in their job search to recognize this is a scam.
I got the same email.. i havent found anything about his business or him on the internet anywhere. all you can do is try to accept the job and see what he does. you've got nothing to lose unless he asks you for any money