Lowe's offers the Shop-Vac 16-Gallon 5.75-Peak HP Vacuum, model no. 5921611, for $49 with free shipping. That's $1 under our Thanksgiving Day mention, the lowest total price we could find for a comparable vacuum by $55 and the best price we've seen for any 16-gallon vacuum. Features include a 6-foot hose, 12-foot power cable, rear blower port, and casters.
Update: It's now available for in-store pickup only.