Are you crazy?
The site
www.free6online.com
Has links to warez & hacked passwords.
No link trades in place, not enough content to expect bookmark returns.
No traffic stats to verify his "80K"
And last but not least, he is using a hotmail account for an e-mail.
Good god, why on earth would you mail him $300 for advertising?
There are many websites which offer advertising, the one you selected looked very shady at best.
Sorry to hear you lost $300, but after looking at the website, I'm just baffled you felt that person could be trusted.