I know that I've run into some good supplies and gear deals from time to time (typically by accident), and thought "I bet that there is a ton of homebrewers out there that have done the same". What better than a forum to share and compile tips and tricks for getting supplies and gear for a great bargain, amiright?! So, here's a couple I've come across:
Quick Disconnects: www.proflodynamics.com
-- cam lock QD's that work great if you've got a rig with pumps / hoses. These could probably find themselves an application on an immersion / CF chiller!
Plate Chillers and ball valves: www.dudadiesel.com
-- great chillers at lower prices than you could get elsewhere!
I'm sure I've run across more of these types of deals, but can't think of any others of the top of my head... I'll revisit when I do!