Where can you legally see the following series?

I would like to see my childhood series Hannah Montana, Zoey 101 and Drake & Josh again.

Do you know where to look legally (preferably for free)?

I found the site Alleserien.com, but I'm not sure if that's legal. Does anyone have experiences?

I'm paying for Netflix, but unfortunately they do not have those old ones.

Buy all seasons individually would be too expensive.

From Zoey 101, the first season is included in Maxdome. You can try Maxdome for a month for free. Otherwise, the mentioned series are unfortunately not included in any standard flat rate.