Well if you want one, nobody needs to tell you where to buy it. lol Live aquaria has high prices on alot of fish. Dr. fosters on the other hand is pretty good imo on dry goods.
i might be completely wrong but i think there is a difference between a rubber pleco and a rubber LIP pleco. rubber pleco is another common name for what i believe is the chubby pleco which grow to 8"+ i think while rubber lip only gets to 5"
actually i just confirmed this. If the op meant that rubber pleco for $40 was too expensive becuase petsmart has them for less...petsmart has rubber LIP pleco which is a completely different pleco from a rubber pleco which is what the website is selling for $40.