Hi, I'm new to this forum so excuse me if this posting is long. I've been looking to switch from a point and shoot for awhile. Making the switch wasn't such a big deal until a few people saw my photos and want to use them in publicity material and the shutter button broke off. The Canon that I use is fine for posting photos on the web but I want to do prints and produce some for professional type of photos. I've checked out the Nikon D90, D80, and D60. I'm still a student so budget is limited, however I'm not sure about buying used cameras. Any suggestions??