Strait-Line 6041101CD Laser Level $18

Amazon.com has the Strait-Line 6041101CD Laser Level LL120 for $23 - $5 rebate [Exp 12/31] = $18, with free shipping on $25. If you're going all-out consider the Strait-Line 6041103 Laser Level X3 for $30 AR

• Dual Bubble vials for horizontal and vertical layout
• Most powerful laser line - 4x more visible, Rotates 360 degrees
• Mounts to any surface with no damage with 3M Command Strips