Finding a place in Boulder?

Hey so I am a student trying to find a place to rent in Boulder CO. I have roommates in mind and I want to move out as quick as possible. It seems like every time I E-mail someone one they do not respond. I want to move out within the next 10 days. Also any advice? I only have school 2 days a week allowing me time to work and I have 1500$ saved, any idea on how much I should be willing to spend monthly?