PStars has $ 0.50 S&G tournaments for 45, 90 and 180 players. But there are also good $ 0.55 MTTs. Hot (turbo), Big (slower) and Bounty Builder (PSKO tournament). There are a couple of good $ 0.55 satellites to both good $ 5.50 + $ 11 tournaments.
I hope I could help you.
Good luck.