Go for the best...
http://www.minox.com/minox2002/index.phtml?&speechchange=e&sprache=e(EDIT: Not a direct link. Click on the left "Products - 8x11mm - 8x11mm Cameras" )
Thi s is a direct decendant of the ones that have appeared in so many beloved spy movies. When closed, it is about 4.25" x 1.1'" x 0.63". If it is good enough for James Bond, then it is good enough for me. <img src="/images/graemlins/grin.gif" alt="" />
The base "ECX" model is not as good as the one shown above, but can be in the low $300 range.
**EDIT**
Check out the following page:
http://www.bhphotovideo.com/bnh/controller/home?O=NavBar&A=search&Q=&ci=616I have ordered from this company before. They have a very good reputation in the photo world.
Also note that the "LX" is the "best" minox camera. The CLX and TLX are "special editions" with an associated price increase. The street price of the plain LX should be around $500 or so. It is funny that the LX is no longer listed.