Amazon offers Prime members the Alpine Bird Bath Fountain with Fish Top, model no. TEC104, for $28 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $10.62.) Except for the mention below, that's the lowest total price we could find by $24. It measures 20" x 20" x 41" and features three tiers. Of note, it may take up to two months to ship.

Need it sooner? Hayneedle has it for $28 plus $4.99 for shipping.