Equipment?

[malicious-pengy.livejournal.com]

Hey gals! Teeny-tiny questions post here. There's an honors photography class that would actually fill some requirements for me, but "Students must provide a digital camera with lens, shutter, aperture and focus controls, with a minimum 4 Mega pixel capacity, and 512 memory card. No disposable and/or fixed focus cameras." Could any photographers here show me the kind this is talking about? Or estimate the cost of getting one? If it's not that high, I can just consider it part of my class supplies budget, but I don't know how costly of a camera I can justify to myself.