Woot offers Apple MJVU2AM/A HDMI to DVI Adapter for $13.99 (reg. $39) after code with free shipping. 

Apply Code: APPLEFIVE

Product Description:
Use the HDMI to DVI adapter to connect a single-link dvi digital monitor, such as the 20-inch or 23-inch apple cinema display, that includes a DVI connector. Review the documentation or check with the manufacturer of your monitor's make sure you're choosing the right adapter.High lights enables Mac Mini, MacBook Pro with Retina Display, and Mac Pro systems with built-in HDMI to connect to a DVI display.Supports single-link DVI devices up to 1920-by-1200 resolution.