Do you think this is a scam or not?

[Mtdew789]

Okay, so, my friend does all of these online marketing businesses and seems to make a lot of money. He offered to sell me part of his website for $140. He told me the site makes up to 30 sales a day, and the website makes an estimated $1,400-$2,800 a week. I can get paid via paypal, check, or direct deposit.
I know this guy is real, because, well, I'm friends with his friends, I have his phone number, I have his Facebook, and I have his address.

I would have definitely already signed up if it was free.
But I've wary about the $140 upfront cost.
Considering, if it ISN'T a scam I'll get that back in less than a week.
If it IS a scam, I'm out $140.

The job is really easy. Advertising. Marketing. Etc.

What would you do?
Would you go for it or not?
Well.
It isn't for free.
Heh.