You absolutely right about searching before you paying, and to be honest with you I search and get this
https://bitcointalk.org/index.php?topic=1668010.0 and I was satisfied with the positive results inside this link, and it was my bad for not searching deeply and more
So what you suggest guys?
No bad feedback because he was deleting everyone's comments which weren't in favor of his scam site
So how can I know he was doing that, and as I said I don't know anything about you or him and If I know there was a lot of problem about this site I will not buy it

you didn't check the negative trust? $450 isn't a normal price for an adnetwork, its scripts are worth more than that and you ain't suspicious about that?
its already yours. there is nothing else that you can do now and I suppose we can all proceed with out own lives again. and you can somehow try to deal with him.