Harbor Freight Tools offers the 3/4 HP Heavy Duty Concrete Vibrator for $79.99. Coupon code "56762840" cuts the price to $63.99. With $6.99 for shipping, that's $36 off and the lowest total price we could find. This 120V, 600-watt concrete vibrator features a flexible 1-1/2" x 26" shaft and a vibrating 2" x 18" rod/head.