Home Depot offers the DeWalt 20-volt Max Lithium-Ion Cordless Grease Gun, model no. DCGG571M1, for $199 with free shipping. (Jet.com, Amazon, and Lowe's charge the same.) That's the lowest total price we could find by $50. It features a variable speed trigger, 42" flexible hose, and comes with a charger, case, and shoulder strap. Deal ends May 31.