Where can a person get a do-it-yourself blood test?

There are many different web sites which offer home blood typing kits. For example Amazon.com offers a blood typing kit that comes with everything from the lancet to the gauze for $13.70. A few others are ThinkGeek.com, DIYlife.com, and Lifestyleofhealth.com. The draw back to this is the consumer must use a card to decipher the results for themselves which may not be as accurate as having it done by a professional. Most blood drive mobile units provide this service for free.