The Bean Farm is good; I've gotten a lot of stuff from them, and they're very prompt. If you're looking for fairly clear boxes that aren't too expensive, Iris makes some good ones. Office Depot has some smaller sizes, and Stacks and Stacks carries a lot of different sizes (check out www.stacksandstacks.com). They are a little more than Rubbermaids or Sterlite, but clearer and IMO stronger. I have a mix of Sterlite and Iris in my rack (for snakes, not geckos).
HTH
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Jeannie
0.1 Baja de L.A. Rosy Boa (Bella)
0.1 Okeetee Corn Snake (Bess)
1.1 Rubber Boas (Isaiah & Esther)
0.0.1 Hermann's Tortoise (Moxie)
1.0 Leopard Gecko (George)
2.0 DSH Cats (Amos & Silas)
1.0 English Springer Spaniel (Jimmy)
and...
2.0 Kids w/ 0.0.1 California King Snake (Rex), 0.1 Leopard Gecko (Geico), 1.0 Mexican Rosy Boa (Lucas)
1.0 Husband (no pets, lol)