Look for a Hohner 114C. They come up on Ebay occasionally (one for sale right now: see link #1 above).
:http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=270199268990&ssPageName=STRK:MEWA:IT&ih=017
Savoy music center sells them new at around $550. Best price I know of. It's what I started on and what Marc Savoy recommends. Just don't get an Ariette or any other cheap chinese box. It'll make learning more difficult.
The bass spoons aren't a big deal. Buttons are better, but the transition from spoons to buttons is an easy one. A 114 can also sound both wet and dry: you just close the second middle reed to get a dry "cajun" sound. With all stops open, it has a great old-time wet sound. It's a very nice instrument for the money. Many professional players keep one around.
but i still think chinese for under $175 with case
is one valid way to go
hey, it's 1/3 the price of even a hohner
don;t expect either one to sound like a
a $1600 hand made though
you could always sell it for $100 later