A 2nd hand Canon T2i with the kit lens (or EF 50mm f/1.
and a cheap EF 80-200mm USM III will come out less than or right close to $600, and it's not exactly a "sucky camera". One thing I can't stress enough is Megapixels does NOT mean high quality, Megapixels means larger image. This is the same reason the Canon 1D-C is only 18 MP while the 5D Mk III is 22 MP, and the 1D-C is a top-of-the-line while the 5D is a fairly high end camera, but not one that you have to sell your children for.
I'm personally still managing to survive with a Canon EOS 300D (yeah 2003!) with the EF 50mm f/1.8 and the EF 80-200mm USM III, which isn't a very good camera by today's standards, but despite horrible low-light performance it still takes better pictures than 95% of point-and-shoot cameras\phones I've seen.