I actually got mine at uber low price from an electronics shop near my house because I'm a good friend of the owner, however, if you don't have that luck (which is the big mayority of cases), I'd recommend you to use LiveSWF. It's what I used before migrating to flash 8 and finally CS4. The bad thing is you can't work on collabs because they're all made on .FLA files, however, you can make an account on that site and starts collabs there, the community is very united and helpful, just go to the "Downloads" Thread, there, just download it. Instead, if you want to use AS, I might recommend Flex.
Best of luck to you my sir, always good to help an aspirating animator.