If you're a frugal shopper, your best bet is this American Apparel Tank. It's a wonderful product, while not very pricey. Another great option is this Forever 21 Tank. While the price is not too high, be sure that this item will become an excellent addition to your wardrobe. You may also want to look at this Stateside Tank. This item is not expensive either, but it will make a difference in your wardrobe.
If you're looking for a good deal, look no further than this P.A.R.O.S.H. Tank. This item doesn't cost a fortune, but absolutely indispensable in your wardrobe. Also check out this Giamba Tank. It's an attractive option both price and quality-wise. And do check out this Joie Tank! It's a very popular item and good value for money.