I don't personally have it, but I can assure you this:
If you are considering learning actionscript, you definately need an update. Learning with all the deprecated functions messes you up bad. Plus, the earlier versions of Flash didn't have many capabilities for Actionscript if you know what I mean.
But, on the other hand, if you are wanting to learn how to animate, I'd tell you to stay with Flash 3. Flash was originally created as a program to animate, so I doubt the version really depicts how well you can make an animation. As long as you can draw on a stage on different frames, I'd say you're set.