Reddit mentions of Yamaha YCL-650 Bb Clarinet

So yes, to play ALL songs you'll need a chunk of harmonicas. However, its very important to get a solid, quality harmonica. I'd recommend spending at least $30 per harmonica and getting a Hohner Special 20 or Lee Oskar (or any other equivalent-or-better quality harmonica) per diatonic you get.

You can spend more, like $60+ per Harmonica if you want... if you want to go cheaper, try to stick to at least the stuff over $30.

So I know that gets expensive, but look at the songs that are available: http://www.reddit.com/r/harmonica/comments/i3w6o/song_keys/

True, there are eight harmonica keys for all the songs. But obscure harmonicas (like "Low C") don't really have very many songs for them. In that song list, C, F, and D cover most of the songs. Although different genres have preferences for different keys.

I mean, you have seven harmonicas in seven different keys. Which ones do you really use? You probably only use one of them a lot, and maybe two others. Just upgrade the few that you actually are using.

In any case, if you're going the Diatonic Route, it will be more important to get a few quality harmonicas (Hohner Special 20, Lee Oskar)... rather than getting leaky, unplayable, unbend-able cheap stuff.

And Harmonicas are lucky: entry-level professional-grade Harmonicas start at $35. Unlike other instruments which are far more expensive (look at those Professional quality Clarinets)