Home Depot offers the Chamberlain Universal Laser Garage Parking Assist, model no. CLLP1, for $16.68. (Amazon charges the same.) Opt for in-store pickup to avoid the $5.99 shipping fee. That's tied with our October mention and the lowest price we could find now by a buck. It features plug-in installation, class 2 laser, and anchor.

Update: It's now sold out at Home Depot; however, Amazon charges $16.68 with free shipping for Prime members.