If you're after a thrifty option, this Hinge Tank will fit the bill. It's a foolproof choice, while not very pricey. In this price range, you can also consider this Yummie by Heather Thomson Tank. It's also a popular item and won't break the bank. You might also want to consider this Halogen Tank. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you're looking for something in between pricewise, look no further than this Paige Tank. This item doesn't cost too much, but definitely deserves a place in your wardrobe. It's also worth taking a look at this Helmut Lang Tank. This item is ultra popular and, just as importantly, not too pricey. Alternatively, opting for this Pam & Gela Tank is a smart choice as well!