I was the first in line 45 minutes before they opened last year. I scored a 54 gallon corner tank with glass hood and light for $54. The sticker said $289.
Their $1/gallon sale rocks. Just get there plenty early and wait by the door and know where you're going in the store beforehand. Some of the fish nerds can be pushy.
Such as you, but who can resist? What if.... it was on a large scale. Hmm, 300G for 300 smackers! But thats in reality, all thier tanks combined. Or does petco usually have a lot of tanks?