Genuinely surprised by your experience. What are the places that ended up being cheaper than Amazon? I've stopped a lot of price comparing because at one point in time it felt like a waste of time since Amazon almost always comes out the best anyway, but maybe things have really changed?
Edit: 21 orders to date. At least 1 or 2 more before the end of the year.
Recently...
Monitor: Newegg, by stacking 3 promo codes.
Bit driver set (tired of my separate disjoint ones): again, Newegg, surprisingly (didn't buy it there, due to a minimal price difference, but it was cheaper).
HDDs: Newegg, again, with a promo code stacked on seasonal sale.
SSDs: Newegg had everybody beat with the 730 sales.
Aside from some good monitor sales, Amazon is usually not the cheapest for PC parts, IME. Often times, I can find the sellers have an eBay storefront, or their own site, with cheaper options, too.
Amazon is competitive, and I don't bother buying elsewhere to save just a few dollars, but for what I buy and when I buy it, they are not the cheapest as often as they are. If Prime or free shipping eligibility were universal, they likely would be cheaper most of the time, but I find I rarely end up with a whole cart of eligible items.