Note: The Davinci 3D printer went is now $529 vs the original $499 at Amazon.com. Demand drove it up apparently. And they are out of stock again. I'm told that MicroCenter will carry them so if you have one of those stores near you check it out.
If you buy one through the link in the upper right on this blog, I get a small royalty so if you like what I write consider clicking there first.