What is a good street/trick skateboard?

i started skateboarding little while back, and im getting preety good at riding but i cant ollie for the life of me. my brother is convincing me that its my board-ive got a 10 dollar board from walmart- but im just not sure, if that is the case, please tell me what board i should get, i dont really have any money but i could come up with 50/60 $ so if there are any good trick boards out there for cheap i would love to hear about them... thanks so much