I second Nick's recommendation. A lot of people on this forum would say just start shooting on whatever you've got. There's some wisdom to that. At the same time, if you've got a $200 budget, I would recommend used miniDV. It doesn't matter which model -- whichever one you can find for cheap that has the three must-have features: manual exposure, manual white-balance, and manual focus. In my opinion, you want not just auto focus, but a focus ring.
If you're patient, and search diligently, you might be able to get one for less than $150.
A tripod is a must. In your price-range, with your left-over money, you're going to get a flimsy piece of crap. Treat it with care; it will break easily. But you still need it.
You'll want some lights. Heck, even a $20 construction light (hardware store) is better than nothing.
If you can find a way to squeeze a cheap $30 shotgun mic into your budget, God bless ya. It won't sound anything like what the pros are using (or even the intermediate amateurs like myself), but it will be better than in camera's built-in mic.