Best Buy offers the open-box Sony Sonnar T FE 55mm f/1.8 ZA Lens for a7 Series Cameras, model no. SEL55F18Z, for $749.99 with free shipping. (Click "Open-Box from" to see this price.) That's $248 below the best in-stock price we could find for a new lens. It features five aspherical lens elements, Carl Zeiss T-star coating, and 0.14x magnification.

A 1-year warranty applies, although it's unclear who backs it.