We already knew Canon's pro-caliber EOS 5D Mark III would hit shelves by the end of March, and now it looks like you can circle a very special date in your calendar. A tipster sent in that shot of Best Buy's database, which confirms the retailer will start selling the camera on March 25th, a week from Sunday. Already have your $3,500 saved up and ready to go? You can spend the next week poring over the 404-page user manual, which you'll find in PDF form at the source link below.