For that pressure range, you can make your own using some thick
aluminum or steel sheets. Should not cost more than a few hundred
bucks if you know how to weld. You can also use acrylic or plastics
but you need thicker stock and might cost more. For used equipment,
the usual places are ebay and bidservice.

On Thu, Aug 7, 2008 at 3:47 PM, Dave Goldstein
 wrote:
> Hi, I am trying to build a vacuum system that need a chamber with >8"
> inner diameter and >10" height. This system will be working at
> hundreds of mTorr so it will be very easy to achieve.I am tight on
> budget so I just want a used one, preferrable one taken off a bigger
> vacuum system. However, I couldn't find anything that is below $1000.
> Can anyone suggest a place that sells used vacuum parts cheap? Thanks!
>
> Dave