Grey_Raven_Wolfe
are you trying to buy the picture to put in a frame, or use on a t-shirt or what? If you are just wanting to get it so that you can have it put on a shirt, or draw it, etc, I suggest just going to the link I put below, and saving the picture, then putting it in paint or something like that and getting rid of all the black background and you should be fine.

Mark Veldhuysen
Try an auction house such as Sotheby's and/or Christies. If you buy from a dealer, you pay far too much! Mark Veldhuysen President the M.C. Escher Company B.V. www.mcescher.com

Sofie
Take a look at the site I have listed below, they have some.