>>5370429>>5370429Ebay is a good place to get them, just make sure they are Takara, regardless of generation. I'd say start with either metal fight or Burst, they're both good to start on if you want to play competitively. It would be good to get a BB-10 stadium for MFB, but they are tough to get and often expensive, if you get into Burst then the new stadiums shouldn't be hard to get at all. You don't need a fancy stadium to play, but if you intend on ever playing competitively they are good for practice because they are standard use through WBO events, but hey, I started playing in a steel wok.
If you have any questions feel free to ask.