This Dyson DC50 Animal Vacuum drops from $499.99 to $399.99 with code DYSONHD20 through 7/9 at HomeDepot.com. Plus, shipping is free. This is the only site we could find this vacuum for under $499, and one of the only times we've seen a coupon that takes $100 off a Dyson. It has ball technology, a HEPA filter, and weighs only 11.6 lb. It's already backordered until 7/18, but you can also order it here for free in-store pickup. Sales tax is charged in most states.