Do guest blogging on high authority blogs or you can do Article directory submission on quality sites like Squidoo, Hub pages or Ezine to get backlinks or many other things but it depends on your site theme.
Buddy, Free psn codes is dead i am On that niche on First and making 10 - 20$ a day, PPD Stuff right ?
In that budget I think you can get 2/3 posts on authority blogs. As I recently paid around $100 per post.
I'm not sure if It's too early to get into PBN. I wanted to save a little more money and get into it!With $280, you can buy several expired domains with high PR (carefully verify the PR) and put a permanent T1 contextual backlink right on the home page. Check around for guides on guestbook opportunities, as while many cost money, you can probably find one that isn't $100, ouch.