Ask HN: I need a desk

I'm looking for a desk to put in my apartment. I'd like enough room to comfortably sit 2 24" monitors, and still have room to work on the problem sets for my math courses (this means books and paper thrown everywhere). I'd like to have an L shape desk, but if I can find one long enough then a straight desk will work too. The desk shouldn't be any longer than 6 feet.

If those requirements aren't hard enough then here's another one: I can't afford to spend more than $250, unless I really like the desk in which case I might consider doing $300.

Where can I find such a thing?