If making accurate, high-definition and printable 3D models from real objects was as easy and cheap as you wish it was, then nobody would spend thousands of dollars and hours on 3D scanners and their associated software. 123D Catch was an attempt at short-cutting the process, but it never really worked very well. I haven't tried the Thingiverse thing aardvark points out, but from the mesh in the picture it doesn't look like it manages to capture detail on small objects with any kind of fidelity. If you're using the meshes in something like an animation project, then a low-res mesh like this can be all you'd need, since the photo-texture mapped on top of it conveys an impression of detail as it moves. But for 3D printing, the detail needs to all be there in the mesh.