Which website is best to buy silver the hedgehog

You must have seen this: http://jevangood.deviantart.com/art/Silver-The-Hedgehog-81168811

The image above is fan-made; the picture of Silver on the front is from the Sonic Rivals boxart, the screenshots on the back are from Sonic '06 (and are too high-res for a DS, anyways), and there are numerous grammatical errors on the back.

As of when this was written, there is no Silver The Hedgehog game released, announced or otherwise.