Thanks for the tip about Shop Runner.  I hadn&#x27;t heard of it before now but a quick look shows a couple of stores listed that I order from often enough that it will make the -- free (thanks AmEx!) -- membership worth signing up for.<p>I recently (during 4Q15) built myself a new server and ordered nearly everything from Amazon (with the exception of ordering half of the SSDs and HDDs from NewEgg, and picking up a spare one of each from a nearby Fry&#x27;s).<p>I chose to order from Amazon both because of the free two-day (Prime) shipping and also because I had a new Discover card.  In 4Q, Discover gives you 5% back on purchases on Amazon.  In addition, at the end of the first year, they double all your cash back.  Thus, in effect, I got an extra 10% discount off of all my Amazon purchases during 4Q (which added up to a few thousand dollars), although I won&#x27;t &quot;see&quot; it until basically the end of 2016.