If you're a thrifty shopper, your best bet is this Zella Tank. It's a wonderful item, while not very costly. Also take a look at this Lucky Brand Tank. It's an item you're bound to love which also doesn't cost the earth. 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.
If you're a bargain shopper, we've got your back with this Misook Tank. This item is likely to become a total wardrobe staple. You might also want to consider this Tank. It's an attractive option both price and quality-wise. Alternatively, opting for this Peachoo+Krejberg Tank is a nice choice as well!
If you want to splurge on a luxury piece, why not opt for this Milly Tank - a great luxury choice. While you're at it, also have a look at this 3.1 Phillip Lim Tank. Yes, this item is expensive, but it does not mean it's not worth it. In this price range, you can also look at this Atos Lombardini Tank. You won't regret the money spent!