If you're a thrifty shopper, your best bet is this Moon River Tank. It's a terrific item, while not very expensive. In this price range, you can also look at this Topshop Tank. It's an item you'll fall in love with which also doesn't cost too much.
If you're looking for an item in the middle of the price range, you're in luck with this Sejour Tank in stock and waiting for you. You are bound to love this item. Another good option is this Wilt Tank. It's an attractive option both price and quality-wise.