Petsmart sells a nice 2.5 gallon tank for $9.95. It's just the tank and a glass lid, but it's nice I have one for my frogs. They also sell a 1 gallon with a light and filter for around $12. Both are inexpensive, see if your mom will let you do extra chores for some cash.

Unless there is someone in your area it would cost more to ship a small aquarium then what it's actually worth.