If you're serious about getting into this type of photography, but don't have a big budget, look at used equipment. I still get a lot of use out of my Canon 40D that I bought used about 3 years ago. For that matter, I look back at pictures I took with my 5MP, 1st generation Digital Rebel, and I'm still quite happy with those. A good lens, especially a macro lens isn't going to come cheap, but you certainly don't have to get the latest and greatest camera to take quality pictures.