We got Bowser during the sale back in July, and we got a 20 long tank for $20.
Of course, we realized that she needed a bigger tank just weeks later after more research, but the sale was over.
So we ended up paying full price elsewhere for a 55 gallon, only to have the sale come back at Petco two weeks later! LOL
At least the place where we got the 55 gallon included a stand, filter, and some other cool tank stuff for less than what we would've paid by buying the stuff separately now.
And, Bowser got an appropriately sized tank two weeks earlier, and that made it well worth it!