Wagner Spray Trac Painter for $39.99.  Shipping is $5.99 for a total of $45.98 shipped. Here is a screenshot, along with a video clip demonstration for reference.  This portable spray paint applicator weighs 8 pounds, features a laser distance guide to ensure a consistent coat, up to 12" pattern, four position selector, adjustable flow control knob, and includes a dual hose suction extension, backpack for paint storage, and more.