So I did a search on ebay for CS4 and there's a TON of listings for Photoshop CS4 Extended Windows Full Version for under $200. I feel skeptical since it retails for so much more. And I don't know the deal of Extended vs the regular. I mean, what I read is that it adds 3D motion and some other stuff that I'm sure I won't need. But I just wanted to know if you think I should jump on getting this.