John's right about buying used. It's the only way you'll get a decent SLR setup at your price range.
For extra value, consider the
really old manual focus stuff. The hardware is very solidly built (metal bodies and lenses - Oooh!) and will outlive the energizer bunny. Lenses cost ~25% of new autofocus glass. Maybe even something like
this?! (My baby - please forgive the mild proselytizing. )
[url=http://www.keh.com]http://www.keh.com is another reputable new and used dealer. They offer a good warranty and large selection. You can find better prices on E-bay, but you can also 'buy' a bucketload of grief if the seller isn't playing nice. Prices at camera shows are probably the lowest, but you'd better know what you want and how to wring it out before buying.
You could also buy a mid-line digicam. Don't sweat the Megapixels. A 4 or 5 MP camera with good glass, decent features and fairly solid construction will take fine shots. IMO, look for manual override options, aperture and shutter priority exposure modes, exposure compensation (a must) and as many other user controll features as you can find. You don't want a one button 'PHD' (push here, dummy) camera!
I do have my doubts regarding consumer digicam longevity. IMO, the mfgs are pimping megapixels and other baloney, and aren't building terribly durable instruments. Make sure you handle the camera before you buy. Look for flimsy cover panels, and other exposed parts, including extending lens assemblies, that may be damaged if the camera gets dropped or swung onto a hard surface. If it feels like a cheap plastic toy ..... it probably is!
Keep in mind that the camera is NOT taking the pictures, you are! Any camera with usable controls will produce fantastic images if the bells, whistles, and automation help you, rather than geting in the way. At the same time, you'll need to familiarise yourself with the camera, and how it 'thinks', to make it do what you want.
-Greg