Trying to watch this show? Well...check this out.
http://www.sell.com/25SHXH
I can vouch for the seller myself. Just bought from him and I'm happy to say this is not a scam. The quality is a little spotty (video quality is VHS-esque, some episodes have a few minor audio "quirks" or cut off for a few seconds and then return) but overall this is a great set, reasonably priced and (as far as I know) the only way to watch the complete series.
I usually don't advocate this type of thing, but Nickelodeon has absolutely dropped the ball on this show. I know I would've paid top dollar for a complete series set of this and many other old Nick shows. I'm pretty sure I'm not alone on that, either. Why the hell did they release the first season and none of the others? Why only release a few random episodes on iTunes and not the whole series (which would cost them next to nothing) ?
Well, since they've decided Clarissa is not worth releasing it's up to the rest of us to keep it alive. For a long time I had been looking for some way to find this show online and I had all but given up until I discovered this set. I don't want anyone else to have to go through the same thing. Spread the word, share the tapes, and keep Clarissa available to the general public. As a fan, it's your duty, because Nickelodeon sure as *beep* isn't going to. I hope they lose a lot of potential revenue from their asinine treatment of their classics; it'd serve them right.