Target offers the Britax Marathon G4 Plus Convertible Car Seat in four colors Wave (pictured) for $180 with free shipping. That's $22 below our July mention, which didn't include the cup holder and sun shades, and the lowest total price we could find by $23 for the seat alone. This seat accommodates children from 5 to 40 pounds in the rear-facing position and from 20 to 65 pounds in the front-facing position. It includes a five-point harness, cup holder, and sun shades.

Update: It's now available for in-store pickup only.

Update 2: Coupon code "TGTZYXKP" cuts it to $165.