If you'd rather not spend much, your best bet is this Express Tank. It's a wonderful piece, while not very costly. In this price range, you can also take a look at this Hype Tank. It's also a popular item and won't break the bank. You might also want to consider this Joe Fresh Tank. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you're looking for a happy medium, you're in luck with this Tibi Tank in stock and waiting for you. You most certainly will love this piece. Also check out this Ralph Lauren Tank. It's an attractive option both price and quality-wise. Alternatively, opting for this Tank is a nice choice as well!