3D printing is currently being overhyped in the media - towards us consumers. Sure its revolutionary, and may radically change our lives, but there is nothing that us consumers can do with the consumer 3D printers that will change much in our lives - except make our wallets/bank accounts lighter.
That being said, technology (in general) is changing more and more rapidly. And possibly in the next year and a half, it may be more justifiable as a purchase for the common household.
Here are several 3D printers you can purchase now, and more are being release daily. So do look around before making your purchase: http://www.engadget.com/2013/01/29/3d-printer-guide/
Before you make your purchase, and to help you decide, please visit your local hackerspace or makerspace. The people there may be able to answer your questions, and you may get first hand experience on a couple different models.
What you need to know about buying a 3D printer
THINKING OF BUYING A 3D PRINTER? HERE’S WHAT YOU NEED TO KNOW:
How to Get Started with 3D Printing (Without Spending a Fortune)http://lifehacker.com/how-to-get-started-with-3d-printing-without-spending-a-1340345210