If you'd rather not spend much, you'll appreciate this Hinge Tank. It's a fail-safe choice and a good investment. In this price range, you can also look at this James Perse Tank. It's also a popular item and won't break the bank. You might also want to consider this Free People Tank. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
For something in the middle of the price range, look no further than this Nic+Zoe Tank. This item won't break the bank, but absolutely invaluable in your wardrobe. It's also worth taking a look at this Alice + Olivia Tank. This piece is ultra popular and, just as importantly, not too pricey. Take a look at this Local Tank too! Great value for your money.