Wallmart wants to sell you fish! I think that they have a small selection compared to Petco and Petsmart. when i looked the other day they had about 3 or more fish that were dead!!! :(
If you want a cheap but somewhat good tank then i suggest that you go to petsmart and use your PetPerks card!!! i got one for $25$ (tank and lid only 10gallon) very good deal <_<