I always wondered about "the backroom" where they store stuff. I just thought they would keep all that stuff until they decide to have a sale.Petco,Petsmart and other big lfs chains have rooms where they store aquariums and even filters to normally be sent back to their warehouse. It would be worth asking if they had anything they didn't want.
Luckily, I have a friend there who usually orders fish that aren't usually ordered, kinda like a special order. He also lets me know what's comin in next. I'll see when I can go so I can ask him about where they put all of those tanks. I know he wouldn't take one for himself because he's been trying to get rid of all his stuff for personal reasons. That's why he gave me his GT for $2 and is about to sell me his 29 with lid, light, substrate, and heater (he didn't use a filter because it was basically a livewell) for $30.