Hey guys, I'm kind of interested in getting a BMX bike. I just built up a Surly Instigator Freeride bike but I'm trying to keep it only for mountain biking. I'm transfering to a new school in the fall and living right near campus so I'd like to get a beater for riding around campus and riding to work. A bmx bike looks to be my most versitle choice. I have no idea about them from sizing all the way to whats even a good bike. I picked through the "search", I'm not a newb . I'm just looking for information. I have a little background knowledge about bikes in general so maybe buying a good frame and piecing it together would be a fun idea. I need to keep it cheap, since I just got the Surly. Maybe under $200? Thanks guys.