BuyDig via eBay offers the refurbished Canon EF 50mm f/1.4 USM Autofocus Prime Camera Lens, model no. 2515A003, for an in-cart price of $279 with free shipping. That's $70 under the lowest total price we could find for a new unit. This 10.2-oz. lens is compatible with Canon EF-mount SLR cameras and can also be used in manual-focus mode.
Note that no warranty information is provided.