Autley Direct via Amazon offers the Autley Adjustable Lawn Sprinkler, model no. ALS01, for $16.99. Coupon code "C9GM8I84" drops it to $8.99. Plus, Prime members bag free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $6.97.) That's the lowest total price we could find for an impulse sprinkler with a metal head by $6. It features rotation control and waters up to 65 feet in diameter.