Much good advice all around.
Know what you want and go looking for it. See someone with nice ink similar to what you want? Ask them where they got it. A good tattoo artist is like a good barber, hard to find but once you've found him all is well.
Look at portfolios, look at ink, look at his standard offerings. And if the price seems low, there is likely a reason. As to the needles, they are a one time use item. If they try and stick you with something else run, don't walk, for the door.