but as with any purchase online you do have to be careful. Some of the breeders I have dealt with, that are a pleasure to work with, and have extremely nice snakes are South Mountain Reptiles (link at the top of this forum), Joe Pierce or Snakes Alive, Mike H, and Home Grown Herps, just to name a few. I have never personally dealt with Kathy Love from CornUtopia, but she is one of the most well known breeders with some gorgeous snakes. If you are going to purchase online, it would definately be worth your while to check into anyone you decide to purchase from before sending money.
Like the previous poster said, you may want to check into some reptile shows/sales in your area. You would get to hold and see the snake before purchasing. You will also save on the shipping costs, which sometimes are rather costly.
Whatever you decide, good luck and welcome to the wonderful, but addicting world of corn snakes!!!! 
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Paula
19 Corns,6 Ratsnakes, 1 Ball Python, 2 Hognose
Snake Addict 
www.tlcreptiles.net