Egg man, if you are looking at second hand, that is fine.
make sure of a couple of things - physical condition - you don't want scratches, knocks , bumps etc - if it has been treated rough, then that may hide other pricier issues. A camera is a delicate instrument - it needs to be taken care of to function its best.
The other is frame count - how many photos has it taken. image sensors have a life like everything else, and if it has taken a bazillion pics, then quality will be down.
accessories and lenses - someone else kit can be a really good value buy. Tripods, flash units, lenses etc all add up
know your prices - if it only costs a little more to buy new, then do so. you get a nice new camera and a warrantee.