The Aquafarm costs about $60, depending on what promotions they have running at the time. For that price, I think it's a definite buy if you have any interest in gardening or aquaponics. It's also a great gift for a garden lover.
However, students who attend lower-ranked schools can still take a rigorous curriculum. Wherever you go to school, it's important to take the most advanced courses available and to take advantage of elective credits to strengthen your engineering education.
All in all, Stanford is a great place to study biomechanical engineering. Stanford has earned its great reputation as an engineering school. The professors are experts in their fields, the classes are taught at a high level, and the student community is highly motivated and supportive.