Amazon is deeply discounting various bags of screws, including stainless.

Link: http://www.amazon.com/s/ref=xs_gb_rs...ag=rssfeeds-20

You can refine the search by typing in "stainless" in the box next to "Steals and Deals" at the top of the page. Mostly small machine screws but some useful sizes.

Free shipping if you are a "Prime" member...