If you have a Petsmart near by, go to petsmart.com and print out the page and take it to the store. You won't have to pay shipping. Your final cost will be less than anyplace I have found online.
PetSmart had a penguine 350 for $49.99 in store. I printed the web page from PetSmart.com for the penguine 350 for $26.99 and they honored the price. Before you buy it bring the print out and ask the manager they say they will honor all internet pricing.