My recommendation is eBay. Unless there's a very specific reason you want to pay a lot for the most current version of an Adobe product, you can get older versions for very good prices.

I use Adobe CS6 as I wanted to play with some of the Photoshop painting of 3D objects, but you can get stuff like CS3 or 4, maybe even 5 for a few hundred dollars on eBay. And CS (stands for Creative Suite) comes with a number of the programs - I think Illustrator, Photoshop, and InDesign are all included in CS, can't remember. Definitely a good deal for a couple hundred dollars!